316979191 has 2 divisors, whose sum is σ = 316979192. Its totient is φ = 316979190.

The previous prime is 316979141. The next prime is 316979197. The reversal of 316979191 is 191979613.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 316979191 - 2⁹ = 316978679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316979197) 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, 158489595 + 158489596.

It is an arithmetic number, because the mean of its divisors is an integer number (158489596).

Almost surely, 2^316979191 is an apocalyptic number.

316979191 is a deficient number, since it is larger than the sum of its proper divisors (1).

316979191 is an equidigital number, since it uses as much as digits as its factorization.

316979191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 46.

The square root of 316979191 is about 17803.9094302347. The cubic root of 316979191 is about 681.8312742111.

The spelling of 316979191 in words is "three hundred sixteen million, nine hundred seventy-nine thousand, one hundred ninety-one".