637979116 has 12 divisors (see below), whose sum is σ = 1127303632. Its totient is φ = 315892368.

The previous prime is 637979087. The next prime is 637979141. The reversal of 637979116 is 611979736.

It is a self number, because there is not a number n which added to its sum of digits gives 637979116.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773835 + ... + 774658.

Almost surely, 2^637979116 is an apocalyptic number.

It is an amenable number.

637979116 is a deficient number, since it is larger than the sum of its proper divisors (489324516).

637979116 is a wasteful number, since it uses less digits than its factorization.

637979116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548600 (or 1548598 counting only the distinct ones).

The product of its digits is 428652, while the sum is 49.

The square root of 637979116 is about 25258.2484745083. The cubic root of 637979116 is about 860.8658649125.

The spelling of 637979116 in words is "six hundred thirty-seven million, nine hundred seventy-nine thousand, one hundred sixteen".