131968 has 16 divisors (see below), whose sum is σ = 263160. Its totient is φ = 65920.
The previous prime is 131959. The next prime is 131969. The reversal of 131968 is 869131.
It is a happy number.
It is a tau number, because it is divible by the number of its divisors (16).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (131969) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388 + ... + 643.
2131968 is an apocalyptic number.
It is an amenable number.
131968 is a deficient number, since it is larger than the sum of its proper divisors (131192).
131968 is an equidigital number, since it uses as much as digits as its factorization.
131968 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1045 (or 1033 counting only the distinct ones).
The product of its digits is 1296, while the sum is 28.
The square root of 131968 is about 363.2740012718. The cubic root of 131968 is about 50.9123189048.
The spelling of 131968 in words is "one hundred thirty-one thousand, nine hundred sixty-eight".
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