979897972 has 24 divisors (see below), whose sum is σ = 1781034752. Its totient is φ = 471225600.

The previous prime is 979897949. The next prime is 979897979. The reversal of 979897972 is 279798979.

It is a junction number, because it is equal to n+sod(n) for n = 979897898 and 979897907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979897979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4029 + ... + 44452.

Almost surely, 2^979897972 is an apocalyptic number.

It is an amenable number.

979897972 is a deficient number, since it is larger than the sum of its proper divisors (801136780).

979897972 is a wasteful number, since it uses less digits than its factorization.

979897972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48679 (or 48677 counting only the distinct ones).

The product of its digits is 36006768, while the sum is 67.

The square root of 979897972 is about 31303.3220601265. The cubic root of 979897972 is about 993.2539166973.

The spelling of 979897972 in words is "nine hundred seventy-nine million, eight hundred ninety-seven thousand, nine hundred seventy-two".