79056521 has 2 divisors, whose sum is σ = 79056522. Its totient is φ = 79056520.

The previous prime is 79056499. The next prime is 79056529. The reversal of 79056521 is 12565097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58308496 + 20748025 = 7636^2 + 4555^2 .

It is an emirp because it is prime and its reverse (12565097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79056521 - 2¹⁰ = 79055497 is a prime.

It is not a weakly prime, because it can be changed into another prime (79056529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39528260 + 39528261.

It is an arithmetic number, because the mean of its divisors is an integer number (39528261).

Almost surely, 2^79056521 is an apocalyptic number.

It is an amenable number.

79056521 is a deficient number, since it is larger than the sum of its proper divisors (1).

79056521 is an equidigital number, since it uses as much as digits as its factorization.

79056521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 79056521 is about 8891.3734034737. The cubic root of 79056521 is about 429.1863485156.

The spelling of 79056521 in words is "seventy-nine million, fifty-six thousand, five hundred twenty-one".