79561693 has 2 divisors, whose sum is σ = 79561694. Its totient is φ = 79561692.

The previous prime is 79561687. The next prime is 79561711. The reversal of 79561693 is 39616597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72812089 + 6749604 = 8533^2 + 2598^2 .

It is a cyclic number.

It is not a de Polignac number, because 79561693 - 2⁵ = 79561661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79561633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39780846 + 39780847.

It is an arithmetic number, because the mean of its divisors is an integer number (39780847).

Almost surely, 2^79561693 is an apocalyptic number.

It is an amenable number.

79561693 is a deficient number, since it is larger than the sum of its proper divisors (1).

79561693 is an equidigital number, since it uses as much as digits as its factorization.

79561693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 79561693 is about 8919.7361508063. The cubic root of 79561693 is about 430.0985766426.

The spelling of 79561693 in words is "seventy-nine million, five hundred sixty-one thousand, six hundred ninety-three".