117921568 has 12 divisors (see below), whose sum is σ = 232158150. Its totient is φ = 58960768.

The previous prime is 117921563. The next prime is 117921593. The reversal of 117921568 is 865129711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72386064 + 45535504 = 8508^2 + 6748^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 117921568.

It is not an unprimeable number, because it can be changed into a prime (117921563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842493 + ... + 1842556.

Almost surely, 2^117921568 is an apocalyptic number.

It is an amenable number.

117921568 is a deficient number, since it is larger than the sum of its proper divisors (114236582).

117921568 is an equidigital number, since it uses as much as digits as its factorization.

117921568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685059 (or 3685051 counting only the distinct ones).

The product of its digits is 30240, while the sum is 40.

The square root of 117921568 is about 10859.1697656865. The cubic root of 117921568 is about 490.3781171404.

The spelling of 117921568 in words is "one hundred seventeen million, nine hundred twenty-one thousand, five hundred sixty-eight".