77115013 has 2 divisors, whose sum is σ = 77115014. Its totient is φ = 77115012.

The previous prime is 77115001. The next prime is 77115047. The reversal of 77115013 is 31051177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74080449 + 3034564 = 8607^2 + 1742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77115013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77115413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38557506 + 38557507.

It is an arithmetic number, because the mean of its divisors is an integer number (38557507).

Almost surely, 2^77115013 is an apocalyptic number.

It is an amenable number.

77115013 is a deficient number, since it is larger than the sum of its proper divisors (1).

77115013 is an equidigital number, since it uses as much as digits as its factorization.

77115013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 735, while the sum is 25.

The square root of 77115013 is about 8781.5154159177. The cubic root of 77115013 is about 425.6438002726.

The spelling of 77115013 in words is "seventy-seven million, one hundred fifteen thousand, thirteen".