977486985 has 12 divisors (see below), whose sum is σ = 1694310852. Its totient is φ = 521326368.

The previous prime is 977486941. The next prime is 977487001. The reversal of 977486985 is 589684779.

977486985 is a `hidden beast` number, since 9 + 77 + 486 + 9 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 177502329 + 799984656 = 13323^2 + 28284^2 .

It is not a de Polignac number, because 977486985 - 2⁷ = 977486857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10860922 + ... + 10861011.

It is an arithmetic number, because the mean of its divisors is an integer number (141192571).

Almost surely, 2^977486985 is an apocalyptic number.

It is an amenable number.

977486985 is a deficient number, since it is larger than the sum of its proper divisors (716823867).

977486985 is a wasteful number, since it uses less digits than its factorization.

977486985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21721944 (or 21721941 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The square root of 977486985 is about 31264.7882609174. The cubic root of 977486985 is about 992.4386314780.

The spelling of 977486985 in words is "nine hundred seventy-seven million, four hundred eighty-six thousand, nine hundred eighty-five".