77948631 has 12 divisors (see below), whose sum is σ = 113002552. Its totient is φ = 51776496.

The previous prime is 77948609. The next prime is 77948639. The reversal of 77948631 is 13684977.

77948631 is a `hidden beast` number, since 7 + 7 + 9 + 4 + 8 + 631 = 666.

It is not a de Polignac number, because 77948631 - 2⁵ = 77948599 is a prime.

It is a super-2 number, since 2×77948631² = 12151978149548322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77948639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13141 + ... + 18126.

Almost surely, 2^77948631 is an apocalyptic number.

77948631 is a deficient number, since it is larger than the sum of its proper divisors (35053921).

77948631 is a wasteful number, since it uses less digits than its factorization.

77948631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31550 (or 31547 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 77948631 is about 8828.8521904039. The cubic root of 77948631 is about 427.1720517581.

The spelling of 77948631 in words is "seventy-seven million, nine hundred forty-eight thousand, six hundred thirty-one".