79524721 has 2 divisors, whose sum is σ = 79524722. Its totient is φ = 79524720.

The previous prime is 79524701. The next prime is 79524737. The reversal of 79524721 is 12742597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79210000 + 314721 = 8900^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 79524721 - 2⁵ = 79524689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79524701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39762360 + 39762361.

It is an arithmetic number, because the mean of its divisors is an integer number (39762361).

Almost surely, 2^79524721 is an apocalyptic number.

It is an amenable number.

79524721 is a deficient number, since it is larger than the sum of its proper divisors (1).

79524721 is an equidigital number, since it uses as much as digits as its factorization.

79524721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 79524721 is about 8917.6634271540. The cubic root of 79524721 is about 430.0319446252.

It can be divided in two parts, 79 and 524721, that added together give a triangular number (524800 = T₁₀₂₄).

The spelling of 79524721 in words is "seventy-nine million, five hundred twenty-four thousand, seven hundred twenty-one".