77152513 has 2 divisors, whose sum is σ = 77152514. Its totient is φ = 77152512.

The previous prime is 77152501. The next prime is 77152531. The reversal of 77152513 is 31525177.

Together with next prime (77152531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48121969 + 29030544 = 6937^2 + 5388^2 .

It is an emirp because it is prime and its reverse (31525177) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77152513 is a prime.

It is not a weakly prime, because it can be changed into another prime (77152553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38576256 + 38576257.

It is an arithmetic number, because the mean of its divisors is an integer number (38576257).

Almost surely, 2^77152513 is an apocalyptic number.

It is an amenable number.

77152513 is a deficient number, since it is larger than the sum of its proper divisors (1).

77152513 is an equidigital number, since it uses as much as digits as its factorization.

77152513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7350, while the sum is 31.

The square root of 77152513 is about 8783.6503231857. The cubic root of 77152513 is about 425.7127840553.

The spelling of 77152513 in words is "seventy-seven million, one hundred fifty-two thousand, five hundred thirteen".