77812713 has 24 divisors (see below), whose sum is σ = 126846720. Its totient is φ = 45531360.

The previous prime is 77812687. The next prime is 77812727. The reversal of 77812713 is 31721877.

It is a happy number.

It is not a de Polignac number, because 77812713 - 2¹² = 77808617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77812753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10681 + ... + 16422.

It is an arithmetic number, because the mean of its divisors is an integer number (5285280).

Almost surely, 2^77812713 is an apocalyptic number.

It is an amenable number.

77812713 is a deficient number, since it is larger than the sum of its proper divisors (49034007).

77812713 is a wasteful number, since it uses less digits than its factorization.

77812713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27149 (or 27146 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 77812713 is about 8821.1514554507. The cubic root of 77812713 is about 426.9236225499.

The spelling of 77812713 in words is "seventy-seven million, eight hundred twelve thousand, seven hundred thirteen".