79812653 has 2 divisors, whose sum is σ = 79812654. Its totient is φ = 79812652.

The previous prime is 79812617. The next prime is 79812661. The reversal of 79812653 is 35621897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46485124 + 33327529 = 6818^2 + 5773^2 .

It is a cyclic number.

It is not a de Polignac number, because 79812653 - 2²² = 75618349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 79812653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79812253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39906326 + 39906327.

It is an arithmetic number, because the mean of its divisors is an integer number (39906327).

Almost surely, 2^79812653 is an apocalyptic number.

It is an amenable number.

79812653 is a deficient number, since it is larger than the sum of its proper divisors (1).

79812653 is an equidigital number, since it uses as much as digits as its factorization.

79812653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 79812653 is about 8933.7927555994. The cubic root of 79812653 is about 430.5503193709.

The spelling of 79812653 in words is "seventy-nine million, eight hundred twelve thousand, six hundred fifty-three".