979806987 has 24 divisors (see below), whose sum is σ = 1494924288. Its totient is φ = 617425200.

The previous prime is 979806983. The next prime is 979807001. The reversal of 979806987 is 789608979.

It is not a de Polignac number, because 979806987 - 2² = 979806983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (979806983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28839 + ... + 52832.

It is an arithmetic number, because the mean of its divisors is an integer number (62288512).

Almost surely, 2^979806987 is an apocalyptic number.

979806987 is a deficient number, since it is larger than the sum of its proper divisors (515117301).

979806987 is a wasteful number, since it uses less digits than its factorization.

979806987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81751 (or 81748 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The square root of 979806987 is about 31301.8687461308. The cubic root of 979806987 is about 993.2231740393.

The spelling of 979806987 in words is "nine hundred seventy-nine million, eight hundred six thousand, nine hundred eighty-seven".