79979629 has 2 divisors, whose sum is σ = 79979630. Its totient is φ = 79979628.

The previous prime is 79979623. The next prime is 79979657. The reversal of 79979629 is 92697997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65577604 + 14402025 = 8098^2 + 3795^2 .

It is a cyclic number.

It is not a de Polignac number, because 79979629 - 2³ = 79979621 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 79979629 parts by 12647 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79979621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39989814 + 39989815.

It is an arithmetic number, because the mean of its divisors is an integer number (39989815).

Almost surely, 2^79979629 is an apocalyptic number.

It is an amenable number.

79979629 is a deficient number, since it is larger than the sum of its proper divisors (1).

79979629 is an equidigital number, since it uses as much as digits as its factorization.

79979629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 58.

The square root of 79979629 is about 8943.1330639771. The cubic root of 79979629 is about 430.8503615774.

It can be divided in two parts, 79979 and 629, that added together give a palindrome (80608).

The spelling of 79979629 in words is "seventy-nine million, nine hundred seventy-nine thousand, six hundred twenty-nine".