79357391 has 2 divisors, whose sum is σ = 79357392. Its totient is φ = 79357390.

The previous prime is 79357381. The next prime is 79357393. The reversal of 79357391 is 19375397.

It is a strong prime.

It is an emirp because it is prime and its reverse (19375397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79357391 - 2²² = 75163087 is a prime.

Together with 79357393, 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 (79357393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39678695 + 39678696.

It is an arithmetic number, because the mean of its divisors is an integer number (39678696).

Almost surely, 2^79357391 is an apocalyptic number.

79357391 is a deficient number, since it is larger than the sum of its proper divisors (1).

79357391 is an equidigital number, since it uses as much as digits as its factorization.

79357391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 178605, while the sum is 44.

The square root of 79357391 is about 8908.2765448767. The cubic root of 79357391 is about 429.7301190943.

The spelling of 79357391 in words is "seventy-nine million, three hundred fifty-seven thousand, three hundred ninety-one".