117931 has 8 divisors (see below), whose sum is σ = 131328. Its totient is φ = 105000.

The previous prime is 117917. The next prime is 117937. The reversal of 117931 is 139711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117931 - 2⁵ = 117899 is a prime.

It is a super-2 number, since 2×117931² = 27815441522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (16416).

2¹¹⁷⁹³¹ is an apocalyptic number.

117931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

117931 is a deficient number, since it is larger than the sum of its proper divisors (13397).

117931 is a wasteful number, since it uses less digits than its factorization.

117931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its digits is 189, while the sum is 22.

The square root of 117931 is about 343.4108326771. The cubic root of 117931 is about 49.0391191150.

The spelling of 117931 in words is "one hundred seventeen thousand, nine hundred thirty-one".