117961864 has 16 divisors (see below), whose sum is σ = 221334300. Its totient is φ = 58939392.

The previous prime is 117961859. The next prime is 117961867. The reversal of 117961864 is 468169711.

It can be written as a sum of positive squares in 2 ways, for example, as 88172100 + 29789764 = 9390^2 + 5458^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 117961864.

It is not an unprimeable number, because it can be changed into a prime (117961867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9232 + ... + 17920.

Almost surely, 2^117961864 is an apocalyptic number.

It is an amenable number.

117961864 is a deficient number, since it is larger than the sum of its proper divisors (103372436).

117961864 is a wasteful number, since it uses less digits than its factorization.

117961864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392 (or 10388 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 117961864 is about 10861.0249976694. The cubic root of 117961864 is about 490.4339678966.

The spelling of 117961864 in words is "one hundred seventeen million, nine hundred sixty-one thousand, eight hundred sixty-four".