117731968 has 16 divisors (see below), whose sum is σ = 234544410. Its totient is φ = 58865920.

The previous prime is 117731947. The next prime is 117731981. The reversal of 117731968 is 869137711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 60093504 + 57638464 = 7752^2 + 7592^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459763 + ... + 460018.

Almost surely, 2^117731968 is an apocalyptic number.

It is an amenable number.

117731968 is a deficient number, since it is larger than the sum of its proper divisors (116812442).

117731968 is an frugal number, since it uses more digits than its factorization.

117731968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919795 (or 919783 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 117731968 is about 10850.4363045916. The cubic root of 117731968 is about 490.1151582732.

The spelling of 117731968 in words is "one hundred seventeen million, seven hundred thirty-one thousand, nine hundred sixty-eight".