117964731 has 4 divisors (see below), whose sum is σ = 157286312. Its totient is φ = 78643152.

The previous prime is 117964709. The next prime is 117964733. The reversal of 117964731 is 137469711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 117964731 - 2⁵ = 117964699 is a prime.

It is a super-2 number, since 2×117964731² = 27831355519804722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117964731.

It is not an unprimeable number, because it can be changed into a prime (117964733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19660786 + ... + 19660791.

It is an arithmetic number, because the mean of its divisors is an integer number (39321578).

Almost surely, 2^117964731 is an apocalyptic number.

117964731 is a deficient number, since it is larger than the sum of its proper divisors (39321581).

117964731 is an equidigital number, since it uses as much as digits as its factorization.

117964731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39321580.

The product of its digits is 31752, while the sum is 39.

The square root of 117964731 is about 10861.1569825687. The cubic root of 117964731 is about 490.4379411095.

The spelling of 117964731 in words is "one hundred seventeen million, nine hundred sixty-four thousand, seven hundred thirty-one".