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93

93 is the natural number that follows 92 and precedes 94. It is an odd composite number with prime factorization 3 × 31, and its positive divisors are 1, 3, 31, and 93. In decimal, its representations are 93; in binary, 1011101; in octal, 135; in hexadecimal, 5D; in Roman numerals, XCIII. The ASCII code point 93 corresponds to the closing square bracket, ].

In science, 93 is the atomic number of neptunium (Np), a synthetic actinide named after the planet

In culture, 93 has significance in Thelema, the spiritual philosophy developed by Aleister Crowley. The number

Calendar-wise, the 93rd day of the year falls on April 3 in common years and on April

Neptune.
It
was
first
synthesized
in
1940
by
Edwin
McMillan
and
Philip
H.
Abelson
at
the
University
of
California,
Berkeley.
Neptunium
occurs
only
in
trace
amounts
in
uranium
ore
and
is
produced
for
research
and
for
manufacturing
certain
isotopes.
The
most
stable
isotope
is
Np-237,
with
a
half-life
of
about
2.14
million
years;
other
isotopes
have
much
shorter
lifespans
and
are
used
in
experiments.
Neptunium
can
serve
as
a
precursor
in
the
production
of
plutonium-238
for
radioisotope
thermoelectric
generators
and
for
various
nuclear
science
applications.
is
associated
with
the
words
Thelema
(will)
and
Agape
(love);
adherents
often
invoke
the
phrase
“Love
is
the
law,
love
under
will”
together
with
the
number
93
as
a
symbol
of
balance
between
love
and
will.
2
in
leap
years.