77900977 has 16 divisors (see below), whose sum is σ = 101348352. Its totient is φ = 58061520.

The previous prime is 77900971. The next prime is 77900981.

77900977 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-77900977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77900971) 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, 20223 + ... + 23764.

It is an arithmetic number, because the mean of its divisors is an integer number (6334272).

Almost surely, 2^77900977 is an apocalyptic number.

77900977 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

77900977 is a deficient number, since it is larger than the sum of its proper divisors (23447375).

77900977 is a wasteful number, since it uses less digits than its factorization.

77900977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44028.

The product of its (nonzero) digits is 194481, while the sum is 46.

The square root of 77900977 is about 8826.1530124964. The cubic root of 77900977 is about 427.0849832771.

The spelling of 77900977 in words is "seventy-seven million, nine hundred thousand, nine hundred seventy-seven".