117979812 has 18 divisors (see below), whose sum is σ = 298226838. Its totient is φ = 39326592.

The previous prime is 117979787. The next prime is 117979843. The reversal of 117979812 is 218979711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 117158976 + 820836 = 10824^2 + 906^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1638573 + ... + 1638644.

Almost surely, 2^117979812 is an apocalyptic number.

117979812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

117979812 is an abundant number, since it is smaller than the sum of its proper divisors (180247026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117979812 is a wasteful number, since it uses less digits than its factorization.

117979812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277227 (or 3277222 counting only the distinct ones).

The product of its digits is 63504, while the sum is 45.

The square root of 117979812 is about 10861.8512234333. The cubic root of 117979812 is about 490.4588399532.

It can be divided in two parts, 11797 and 9812, that added together give a square (21609 = 147²).

The spelling of 117979812 in words is "one hundred seventeen million, nine hundred seventy-nine thousand, eight hundred twelve".