117293731 has 4 divisors (see below), whose sum is σ = 117502632. Its totient is φ = 117084832.

The previous prime is 117293713. The next prime is 117293747. The reversal of 117293731 is 137392711.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117293731 is a prime.

It is a super-2 number, since 2×117293731² = 27515638663800722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117293131) 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, 103606 + ... + 104731.

It is an arithmetic number, because the mean of its divisors is an integer number (29375658).

Almost surely, 2^117293731 is an apocalyptic number.

117293731 is a deficient number, since it is larger than the sum of its proper divisors (208901).

117293731 is an equidigital number, since it uses as much as digits as its factorization.

117293731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208900.

The product of its digits is 7938, while the sum is 34.

The square root of 117293731 is about 10830.2230355612. The cubic root of 117293731 is about 489.5062790401.

The spelling of 117293731 in words is "one hundred seventeen million, two hundred ninety-three thousand, seven hundred thirty-one".