79979233637 has 2 divisors, whose sum is σ = 79979233638. Its totient is φ = 79979233636.

The previous prime is 79979233601. The next prime is 79979233673. The reversal of 79979233637 is 73633297997.

It is a Cunningham number, because it is equal to 282806²+1.

Together with next prime (79979233673) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (79979233601) and next prime (79979233673).

It can be written as a sum of positive squares in only one way, i.e., 79979233636 + 1 = 282806^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 79979233637 - 2²⁴ = 79962456421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79979233687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39989616818 + 39989616819.

It is an arithmetic number, because the mean of its divisors is an integer number (39989616819).

Almost surely, 2^79979233637 is an apocalyptic number.

It is an amenable number.

79979233637 is a deficient number, since it is larger than the sum of its proper divisors (1).

79979233637 is an equidigital number, since it uses as much as digits as its factorization.

79979233637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81015228, while the sum is 65.

The spelling of 79979233637 in words is "seventy-nine billion, nine hundred seventy-nine million, two hundred thirty-three thousand, six hundred thirty-seven".