977705877 has 4 divisors (see below), whose sum is σ = 1303607840. Its totient is φ = 651803916.

The previous prime is 977705849. The next prime is 977705881. The reversal of 977705877 is 778507779.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 977705877 - 2¹⁰ = 977704853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977705977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162950977 + ... + 162950982.

It is an arithmetic number, because the mean of its divisors is an integer number (325901960).

Almost surely, 2^977705877 is an apocalyptic number.

It is an amenable number.

977705877 is a deficient number, since it is larger than the sum of its proper divisors (325901963).

977705877 is a wasteful number, since it uses less digits than its factorization.

977705877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325901962.

The product of its (nonzero) digits is 6050520, while the sum is 57.

The square root of 977705877 is about 31268.2886803867. The cubic root of 977705877 is about 992.5127060068.

The spelling of 977705877 in words is "nine hundred seventy-seven million, seven hundred five thousand, eight hundred seventy-seven".