79611613 has 2 divisors, whose sum is σ = 79611614. Its totient is φ = 79611612.

The previous prime is 79611607. The next prime is 79611643. The reversal of 79611613 is 31611697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70593604 + 9018009 = 8402^2 + 3003^2 .

It is a cyclic number.

It is not a de Polignac number, because 79611613 - 2¹³ = 79603421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79611643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39805806 + 39805807.

It is an arithmetic number, because the mean of its divisors is an integer number (39805807).

Almost surely, 2^79611613 is an apocalyptic number.

It is an amenable number.

79611613 is a deficient number, since it is larger than the sum of its proper divisors (1).

79611613 is an equidigital number, since it uses as much as digits as its factorization.

79611613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 34.

The square root of 79611613 is about 8922.5340010560. The cubic root of 79611613 is about 430.1885111795.

The spelling of 79611613 in words is "seventy-nine million, six hundred eleven thousand, six hundred thirteen".