977651969 has 12 divisors (see below), whose sum is σ = 1146230784. Its totient is φ = 831383784.

The previous prime is 977651959. The next prime is 977651977. The reversal of 977651969 is 969156779.

It is not a de Polignac number, because 977651969 - 2¹² = 977647873 is a prime.

It is a super-2 number, since 2×977651969² = 1911606744979153922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977651959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72329 + ... + 84774.

It is an arithmetic number, because the mean of its divisors is an integer number (95519232).

Almost surely, 2^977651969 is an apocalyptic number.

It is an amenable number.

977651969 is a deficient number, since it is larger than the sum of its proper divisors (168578815).

977651969 is a wasteful number, since it uses less digits than its factorization.

977651969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157244 (or 157237 counting only the distinct ones).

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

The square root of 977651969 is about 31267.4266449927. The cubic root of 977651969 is about 992.4944642023.

The spelling of 977651969 in words is "nine hundred seventy-seven million, six hundred fifty-one thousand, nine hundred sixty-nine".