79591279 has 2 divisors, whose sum is σ = 79591280. Its totient is φ = 79591278.

The previous prime is 79591249. The next prime is 79591289. The reversal of 79591279 is 97219597.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79591279 - 2⁹ = 79590767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79591249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39795639 + 39795640.

It is an arithmetic number, because the mean of its divisors is an integer number (39795640).

Almost surely, 2^79591279 is an apocalyptic number.

79591279 is a deficient number, since it is larger than the sum of its proper divisors (1).

79591279 is an equidigital number, since it uses as much as digits as its factorization.

79591279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 49.

The square root of 79591279 is about 8921.3944537836. The cubic root of 79591279 is about 430.1518825282.

The spelling of 79591279 in words is "seventy-nine million, five hundred ninety-one thousand, two hundred seventy-nine".