76564613 has 2 divisors, whose sum is σ = 76564614. Its totient is φ = 76564612.

The previous prime is 76564601. The next prime is 76564627. The reversal of 76564613 is 31646567.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73582084 + 2982529 = 8578^2 + 1727^2 .

It is a cyclic number.

It is not a de Polignac number, because 76564613 - 2¹⁸ = 76302469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76564633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38282306 + 38282307.

It is an arithmetic number, because the mean of its divisors is an integer number (38282307).

Almost surely, 2^76564613 is an apocalyptic number.

It is an amenable number.

76564613 is a deficient number, since it is larger than the sum of its proper divisors (1).

76564613 is an equidigital number, since it uses as much as digits as its factorization.

76564613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 76564613 is about 8750.1207420241. The cubic root of 76564613 is about 424.6287193417.

It can be divided in two parts, 76564 and 613, that added together give a palindrome (77177).

The spelling of 76564613 in words is "seventy-six million, five hundred sixty-four thousand, six hundred thirteen".