79623613 has 2 divisors, whose sum is σ = 79623614. Its totient is φ = 79623612.

The previous prime is 79623587. The next prime is 79623619. The reversal of 79623613 is 31632697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43599609 + 36024004 = 6603^2 + 6002^2 .

It is an emirp because it is prime and its reverse (31632697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79623613 - 2⁵ = 79623581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79623619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39811806 + 39811807.

It is an arithmetic number, because the mean of its divisors is an integer number (39811807).

Almost surely, 2^79623613 is an apocalyptic number.

It is an amenable number.

79623613 is a deficient number, since it is larger than the sum of its proper divisors (1).

79623613 is an equidigital number, since it uses as much as digits as its factorization.

79623613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 37.

The square root of 79623613 is about 8923.2064304262. The cubic root of 79623613 is about 430.2101244534.

The spelling of 79623613 in words is "seventy-nine million, six hundred twenty-three thousand, six hundred thirteen".