79398091 has 2 divisors, whose sum is σ = 79398092. Its totient is φ = 79398090.

The previous prime is 79398083. The next prime is 79398097. The reversal of 79398091 is 19089397.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79398091 - 2³ = 79398083 is a prime.

It is not a weakly prime, because it can be changed into another prime (79398097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39699045 + 39699046.

It is an arithmetic number, because the mean of its divisors is an integer number (39699046).

Almost surely, 2^79398091 is an apocalyptic number.

79398091 is a deficient number, since it is larger than the sum of its proper divisors (1).

79398091 is an equidigital number, since it uses as much as digits as its factorization.

79398091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 79398091 is about 8910.5606445386. The cubic root of 79398091 is about 429.8035717219.

The spelling of 79398091 in words is "seventy-nine million, three hundred ninety-eight thousand, ninety-one".