316287691 has 2 divisors, whose sum is σ = 316287692. Its totient is φ = 316287690.

The previous prime is 316287679. The next prime is 316287781. The reversal of 316287691 is 196782613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 316287691 - 2⁷ = 316287563 is a prime.

It is a super-2 number, since 2×316287691² = 200075806956222962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (316287991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158143845 + 158143846.

It is an arithmetic number, because the mean of its divisors is an integer number (158143846).

Almost surely, 2^316287691 is an apocalyptic number.

316287691 is a deficient number, since it is larger than the sum of its proper divisors (1).

316287691 is an equidigital number, since it uses as much as digits as its factorization.

316287691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 316287691 is about 17784.4789352964. The cubic root of 316287691 is about 681.3351011607.

The spelling of 316287691 in words is "three hundred sixteen million, two hundred eighty-seven thousand, six hundred ninety-one".