77111312 has 20 divisors (see below), whose sum is σ = 149633280. Its totient is φ = 38496288.

The previous prime is 77111299. The next prime is 77111327. The reversal of 77111312 is 21311177.

It is a super-2 number, since 2×77111312² = 11892308876722688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8153 + ... + 14855.

It is an arithmetic number, because the mean of its divisors is an integer number (7481664).

Almost surely, 2^77111312 is an apocalyptic number.

It is an amenable number.

77111312 is a deficient number, since it is larger than the sum of its proper divisors (72521968).

77111312 is a wasteful number, since it uses less digits than its factorization.

77111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430 (or 7424 counting only the distinct ones).

The product of its digits is 294, while the sum is 23.

The square root of 77111312 is about 8781.3046866625. The cubic root of 77111312 is about 425.6369908207.

Adding to 77111312 its reverse (21311177), we get a palindrome (98422489).

The spelling of 77111312 in words is "seventy-seven million, one hundred eleven thousand, three hundred twelve".