79390679 has 2 divisors, whose sum is σ = 79390680. Its totient is φ = 79390678.

The previous prime is 79390673. The next prime is 79390699. The reversal of 79390679 is 97609397.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79390679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79390673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39695339 + 39695340.

It is an arithmetic number, because the mean of its divisors is an integer number (39695340).

Almost surely, 2^79390679 is an apocalyptic number.

79390679 is a deficient number, since it is larger than the sum of its proper divisors (1).

79390679 is an equidigital number, since it uses as much as digits as its factorization.

79390679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 79390679 is about 8910.1447238527. The cubic root of 79390679 is about 429.7901969116.

The spelling of 79390679 in words is "seventy-nine million, three hundred ninety thousand, six hundred seventy-nine".