77647713 has 32 divisors (see below), whose sum is σ = 124250112. Its totient is φ = 42504000.

The previous prime is 77647709. The next prime is 77647729. The reversal of 77647713 is 31774677.

It is not a de Polignac number, because 77647713 - 2² = 77647709 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77647753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18238 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (3882816).

Almost surely, 2^77647713 is an apocalyptic number.

It is an amenable number.

77647713 is a deficient number, since it is larger than the sum of its proper divisors (46602399).

77647713 is a wasteful number, since it uses less digits than its factorization.

77647713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925.

The product of its digits is 172872, while the sum is 42.

The square root of 77647713 is about 8811.7939717177. The cubic root of 77647713 is about 426.6216485570.

The spelling of 77647713 in words is "seventy-seven million, six hundred forty-seven thousand, seven hundred thirteen".