117992317 has 4 divisors (see below), whose sum is σ = 118017820. Its totient is φ = 117966816.

The previous prime is 117992311. The next prime is 117992321. The reversal of 117992317 is 713299711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45077796 + 72914521 = 6714^2 + 8539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117992317 is a prime.

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 117992317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117992311) 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, 3642 + ... + 15787.

It is an arithmetic number, because the mean of its divisors is an integer number (29504455).

Almost surely, 2^117992317 is an apocalyptic number.

It is an amenable number.

117992317 is a deficient number, since it is larger than the sum of its proper divisors (25503).

117992317 is an equidigital number, since it uses as much as digits as its factorization.

117992317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25502.

The product of its digits is 23814, while the sum is 40.

The square root of 117992317 is about 10862.4268467042. The cubic root of 117992317 is about 490.4761676948.

The spelling of 117992317 in words is "one hundred seventeen million, nine hundred ninety-two thousand, three hundred seventeen".