316537493 has 2 divisors, whose sum is σ = 316537494. Its totient is φ = 316537492.

The previous prime is 316537453. The next prime is 316537513. The reversal of 316537493 is 394735613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308283364 + 8254129 = 17558^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 316537493 - 2²⁰ = 315488917 is a prime.

It is equal to p_17098583 and since 316537493 and 17098583 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 316537493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316537423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158268746 + 158268747.

It is an arithmetic number, because the mean of its divisors is an integer number (158268747).

Almost surely, 2^316537493 is an apocalyptic number.

It is an amenable number.

316537493 is a deficient number, since it is larger than the sum of its proper divisors (1).

316537493 is an equidigital number, since it uses as much as digits as its factorization.

316537493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 41.

The square root of 316537493 is about 17791.5005831436. The cubic root of 316537493 is about 681.5144253310.

The spelling of 316537493 in words is "three hundred sixteen million, five hundred thirty-seven thousand, four hundred ninety-three".