977812971 has 4 divisors (see below), whose sum is σ = 1303750632. Its totient is φ = 651875312.

The previous prime is 977812963. The next prime is 977812993. The reversal of 977812971 is 179218779.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 977812971 - 2³ = 977812963 is a prime.

It is a super-2 number, since 2×977812971² = 1912236412511693682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (977812921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162968826 + ... + 162968831.

It is an arithmetic number, because the mean of its divisors is an integer number (325937658).

Almost surely, 2^977812971 is an apocalyptic number.

977812971 is a deficient number, since it is larger than the sum of its proper divisors (325937661).

977812971 is a wasteful number, since it uses less digits than its factorization.

977812971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325937660.

The product of its digits is 444528, while the sum is 51.

The square root of 977812971 is about 31270.0011352734. The cubic root of 977812971 is about 992.5489433107.

The spelling of 977812971 in words is "nine hundred seventy-seven million, eight hundred twelve thousand, nine hundred seventy-one".