977625987 has 16 divisors (see below), whose sum is σ = 1486346400. Its totient is φ = 566226432.

The previous prime is 977625983. The next prime is 977625997. The reversal of 977625987 is 789526779.

It is not a de Polignac number, because 977625987 - 2² = 977625983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 977625987.

It is not an unprimeable number, because it can be changed into a prime (977625983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736612 + ... + 737937.

It is an arithmetic number, because the mean of its divisors is an integer number (92896650).

Almost surely, 2^977625987 is an apocalyptic number.

977625987 is a deficient number, since it is larger than the sum of its proper divisors (508720413).

977625987 is a wasteful number, since it uses less digits than its factorization.

977625987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474582.

The product of its digits is 13335840, while the sum is 60.

The square root of 977625987 is about 31267.0111619259. The cubic root of 977625987 is about 992.4856719735.

The spelling of 977625987 in words is "nine hundred seventy-seven million, six hundred twenty-five thousand, nine hundred eighty-seven".