77431612 has 18 divisors (see below), whose sum is σ = 143015208. Its totient is φ = 36677448.

The previous prime is 77431603. The next prime is 77431637. The reversal of 77431612 is 21613477.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25368 + ... + 28255.

Almost surely, 2^77431612 is an apocalyptic number.

It is an amenable number.

77431612 is a deficient number, since it is larger than the sum of its proper divisors (65583596).

77431612 is a wasteful number, since it uses less digits than its factorization.

77431612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53665 (or 53644 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 77431612 is about 8799.5233961846. The cubic root of 77431612 is about 426.2255045649.

The spelling of 77431612 in words is "seventy-seven million, four hundred thirty-one thousand, six hundred twelve".