117991592 has 16 divisors (see below), whose sum is σ = 221781300. Its totient is φ = 58849920.

The previous prime is 117991589. The next prime is 117991597. The reversal of 117991592 is 295199711.

It can be written as a sum of positive squares in 2 ways, for example, as 116337796 + 1653796 = 10786^2 + 1286^2 .

It is not an unprimeable number, because it can be changed into a prime (117991597) 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, 14759 + ... + 21302.

Almost surely, 2^117991592 is an apocalyptic number.

It is an amenable number.

117991592 is a deficient number, since it is larger than the sum of its proper divisors (103789708).

117991592 is a wasteful number, since it uses less digits than its factorization.

117991592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36476 (or 36472 counting only the distinct ones).

The product of its digits is 51030, while the sum is 44.

The square root of 117991592 is about 10862.3934747366. The cubic root of 117991592 is about 490.4751631211.

The spelling of 117991592 in words is "one hundred seventeen million, nine hundred ninety-one thousand, five hundred ninety-two".