77976365 has 16 divisors (see below), whose sum is σ = 99283968. Its totient is φ = 58588416.

The previous prime is 77976341. The next prime is 77976373. The reversal of 77976365 is 56367977.

It is a cyclic number.

It is not a de Polignac number, because 77976365 - 2¹² = 77972269 is a prime.

It is a super-2 number, since 2×77976365² = 12160626997226450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72824 + ... + 73886.

It is an arithmetic number, because the mean of its divisors is an integer number (6205248).

Almost surely, 2^77976365 is an apocalyptic number.

It is an amenable number.

77976365 is a deficient number, since it is larger than the sum of its proper divisors (21307603).

77976365 is a wasteful number, since it uses less digits than its factorization.

77976365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948.

The product of its digits is 1666980, while the sum is 50.

The square root of 77976365 is about 8830.4226965644. The cubic root of 77976365 is about 427.2227081315. Note that the first 3 decimals are identical.

The spelling of 77976365 in words is "seventy-seven million, nine hundred seventy-six thousand, three hundred sixty-five".