79890959 has 2 divisors, whose sum is σ = 79890960. Its totient is φ = 79890958.

The previous prime is 79890901. The next prime is 79890961. The reversal of 79890959 is 95909897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79890959 - 2¹⁶ = 79825423 is a prime.

Together with 79890961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79890989) 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, 39945479 + 39945480.

It is an arithmetic number, because the mean of its divisors is an integer number (39945480).

Almost surely, 2^79890959 is an apocalyptic number.

79890959 is a deficient number, since it is larger than the sum of its proper divisors (1).

79890959 is an equidigital number, since it uses as much as digits as its factorization.

79890959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 79890959 is about 8938.1742542871. The cubic root of 79890959 is about 430.6910809000.

The spelling of 79890959 in words is "seventy-nine million, eight hundred ninety thousand, nine hundred fifty-nine".