79820929 has 2 divisors, whose sum is σ = 79820930. Its totient is φ = 79820928.

The previous prime is 79820903. The next prime is 79820987. The reversal of 79820929 is 92902897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79691329 + 129600 = 8927^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 79820929 - 2²⁵ = 46266497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79820329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39910464 + 39910465.

It is an arithmetic number, because the mean of its divisors is an integer number (39910465).

Almost surely, 2^79820929 is an apocalyptic number.

It is an amenable number.

79820929 is a deficient number, since it is larger than the sum of its proper divisors (1).

79820929 is an equidigital number, since it uses as much as digits as its factorization.

79820929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 79820929 is about 8934.2559287274. The cubic root of 79820929 is about 430.5652005171.

The spelling of 79820929 in words is "seventy-nine million, eight hundred twenty thousand, nine hundred twenty-nine".