117929257 has 16 divisors (see below), whose sum is σ = 130043520. Its totient is φ = 106444800.

The previous prime is 117929209. The next prime is 117929267. The reversal of 117929257 is 752929711.

It is a cyclic number.

It is not a de Polignac number, because 117929257 - 2²³ = 109540649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117929267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183657 + ... + 184297.

It is an arithmetic number, because the mean of its divisors is an integer number (8127720).

Almost surely, 2^117929257 is an apocalyptic number.

It is an amenable number.

117929257 is a deficient number, since it is larger than the sum of its proper divisors (12114263).

117929257 is a wasteful number, since it uses less digits than its factorization.

117929257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 79380, while the sum is 43.

The square root of 117929257 is about 10859.5237925058. The cubic root of 117929257 is about 490.3887751720.

The spelling of 117929257 in words is "one hundred seventeen million, nine hundred twenty-nine thousand, two hundred fifty-seven".