79700521 has 2 divisors, whose sum is σ = 79700522. Its totient is φ = 79700520.

The previous prime is 79700477. The next prime is 79700527. The reversal of 79700521 is 12500797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78074896 + 1625625 = 8836^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 79700521 - 2¹³ = 79692329 is a prime.

It is not a weakly prime, because it can be changed into another prime (79700527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39850260 + 39850261.

It is an arithmetic number, because the mean of its divisors is an integer number (39850261).

Almost surely, 2^79700521 is an apocalyptic number.

It is an amenable number.

79700521 is a deficient number, since it is larger than the sum of its proper divisors (1).

79700521 is an equidigital number, since it uses as much as digits as its factorization.

79700521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 79700521 is about 8927.5148277670. The cubic root of 79700521 is about 430.3485923944.

The spelling of 79700521 in words is "seventy-nine million, seven hundred thousand, five hundred twenty-one".