117923257 has 8 divisors (see below), whose sum is σ = 121999752. Its totient is φ = 113904000.

The previous prime is 117923249. The next prime is 117923263. The reversal of 117923257 is 752329711.

It can be written as a sum of positive squares in 4 ways, for example, as 15832441 + 102090816 = 3979^2 + 10104^2 .

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 117923257 - 2³ = 117923249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117923227) 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, 10098 + ... + 18379.

It is an arithmetic number, because the mean of its divisors is an integer number (15249969).

Almost surely, 2^117923257 is an apocalyptic number.

It is an amenable number.

117923257 is a deficient number, since it is larger than the sum of its proper divisors (4076495).

117923257 is a wasteful number, since it uses less digits than its factorization.

117923257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28619.

The product of its digits is 26460, while the sum is 37.

The square root of 117923257 is about 10859.2475337843. The cubic root of 117923257 is about 490.3804583709.

The spelling of 117923257 in words is "one hundred seventeen million, nine hundred twenty-three thousand, two hundred fifty-seven".