79319291 has 2 divisors, whose sum is σ = 79319292. Its totient is φ = 79319290.

The previous prime is 79319269. The next prime is 79319293. The reversal of 79319291 is 19291397.

It is a strong prime.

It is an emirp because it is prime and its reverse (19291397) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79319291 is a prime.

Together with 79319293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79319293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39659645 + 39659646.

It is an arithmetic number, because the mean of its divisors is an integer number (39659646).

Almost surely, 2^79319291 is an apocalyptic number.

79319291 is a deficient number, since it is larger than the sum of its proper divisors (1).

79319291 is an equidigital number, since it uses as much as digits as its factorization.

79319291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 41.

The square root of 79319291 is about 8906.1378273638. The cubic root of 79319291 is about 429.6613360095.

The spelling of 79319291 in words is "seventy-nine million, three hundred nineteen thousand, two hundred ninety-one".