977125081 has 3 divisors (see below), whose sum is σ = 977156341. Its totient is φ = 977093822.

The previous prime is 977125073. The next prime is 977125087. The reversal of 977125081 is 180521779.

The square root of 977125081 is 31259.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 977125081 - 2³ = 977125073 is a prime.

It is a super-2 number, since 2×977125081² = 1909546847838513122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977125087) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15630 + ... + 46888.

Almost surely, 2^977125081 is an apocalyptic number.

977125081 is the 31259-th square number.

977125081 is the 15630-th centered octagonal number.

It is an amenable number.

977125081 is a deficient number, since it is larger than the sum of its proper divisors (31260).

977125081 is an frugal number, since it uses more digits than its factorization.

977125081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62518 (or 31259 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 40.

The cubic root of 977125081 is about 992.3161364641.

The spelling of 977125081 in words is "nine hundred seventy-seven million, one hundred twenty-five thousand, eighty-one".