79620239 has 2 divisors, whose sum is σ = 79620240. Its totient is φ = 79620238.

The previous prime is 79620223. The next prime is 79620251. The reversal of 79620239 is 93202697.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79620239 - 2⁴ = 79620223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79620259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39810119 + 39810120.

It is an arithmetic number, because the mean of its divisors is an integer number (39810120).

Almost surely, 2^79620239 is an apocalyptic number.

79620239 is a deficient number, since it is larger than the sum of its proper divisors (1).

79620239 is an equidigital number, since it uses as much as digits as its factorization.

79620239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 79620239 is about 8923.0173708225. The cubic root of 79620239 is about 430.2040477406.

The spelling of 79620239 in words is "seventy-nine million, six hundred twenty thousand, two hundred thirty-nine".