79521493 has 2 divisors, whose sum is σ = 79521494. Its totient is φ = 79521492.

The previous prime is 79521487. The next prime is 79521499. The reversal of 79521493 is 39412597.

It is a balanced prime because it is at equal distance from previous prime (79521487) and next prime (79521499).

It can be written as a sum of positive squares in only one way, i.e., 71267364 + 8254129 = 8442^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 79521493 - 2⁹ = 79520981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79521499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39760746 + 39760747.

It is an arithmetic number, because the mean of its divisors is an integer number (39760747).

Almost surely, 2^79521493 is an apocalyptic number.

It is an amenable number.

79521493 is a deficient number, since it is larger than the sum of its proper divisors (1).

79521493 is an equidigital number, since it uses as much as digits as its factorization.

79521493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 79521493 is about 8917.4824362036. The cubic root of 79521493 is about 430.0261260492.

The spelling of 79521493 in words is "seventy-nine million, five hundred twenty-one thousand, four hundred ninety-three".