997979504 has 20 divisors (see below), whose sum is σ = 1936669200. Its totient is φ = 498193920.

The previous prime is 997979491. The next prime is 997979557. The reversal of 997979504 is 405979799.

It is a congruent number.

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, 39329 + ... + 59520.

It is an arithmetic number, because the mean of its divisors is an integer number (96833460).

Almost surely, 2^997979504 is an apocalyptic number.

It is an amenable number.

997979504 is a deficient number, since it is larger than the sum of its proper divisors (938689696).

997979504 is a wasteful number, since it uses less digits than its factorization.

997979504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99488 (or 99482 counting only the distinct ones).

The product of its (nonzero) digits is 6429780, while the sum is 59.

The square root of 997979504 is about 31590.8136014253. The cubic root of 997979504 is about 999.3260472230.

The spelling of 997979504 in words is "nine hundred ninety-seven million, nine hundred seventy-nine thousand, five hundred four".