316991249 has 2 divisors, whose sum is σ = 316991250. Its totient is φ = 316991248.

The previous prime is 316991237. The next prime is 316991261. The reversal of 316991249 is 942199613.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (316991237) and next prime (316991261).

It can be written as a sum of positive squares in only one way, i.e., 303003649 + 13987600 = 17407^2 + 3740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-316991249 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (316991219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158495624 + 158495625.

It is an arithmetic number, because the mean of its divisors is an integer number (158495625).

Almost surely, 2^316991249 is an apocalyptic number.

It is an amenable number.

316991249 is a deficient number, since it is larger than the sum of its proper divisors (1).

316991249 is an equidigital number, since it uses as much as digits as its factorization.

316991249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 316991249 is about 17804.2480605051. The cubic root of 316991249 is about 681.8399198020.

The spelling of 316991249 in words is "three hundred sixteen million, nine hundred ninety-one thousand, two hundred forty-nine".