76520413 has 4 divisors (see below), whose sum is σ = 77774908. Its totient is φ = 75265920.

The previous prime is 76520407. The next prime is 76520461. The reversal of 76520413 is 31402567.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2181529 + 74338884 = 1477^2 + 8622^2 .

It is a cyclic number.

It is not a de Polignac number, because 76520413 - 2²⁵ = 42965981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76520813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627156 + ... + 627277.

It is an arithmetic number, because the mean of its divisors is an integer number (19443727).

Almost surely, 2^76520413 is an apocalyptic number.

It is an amenable number.

76520413 is a deficient number, since it is larger than the sum of its proper divisors (1254495).

76520413 is a wasteful number, since it uses less digits than its factorization.

76520413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254494.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 76520413 is about 8747.5946979727. The cubic root of 76520413 is about 424.5469922816.

The spelling of 76520413 in words is "seventy-six million, five hundred twenty thousand, four hundred thirteen".