77713207 has 32 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 62640000.

The previous prime is 77713201. The next prime is 77713217. The reversal of 77713207 is 70231777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77713207 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77713201) 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, 514582 + ... + 514732.

It is an arithmetic number, because the mean of its divisors is an integer number (2968560).

Almost surely, 2^77713207 is an apocalyptic number.

77713207 is the 7198-th pentagonal number.

77713207 is a deficient number, since it is larger than the sum of its proper divisors (17280713).

77713207 is a wasteful number, since it uses less digits than its factorization.

77713207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 14406, while the sum is 34.

The square root of 77713207 is about 8815.5094577682. The cubic root of 77713207 is about 426.7415632544.

The spelling of 77713207 in words is "seventy-seven million, seven hundred thirteen thousand, two hundred seven".