316997693 has 2 divisors, whose sum is σ = 316997694. Its totient is φ = 316997692.

The previous prime is 316997671. The next prime is 316997699. The reversal of 316997693 is 396799613.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241429444 + 75568249 = 15538^2 + 8693^2 .

It is a cyclic number.

It is not a de Polignac number, because 316997693 - 2⁸ = 316997437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316997699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158498846 + 158498847.

It is an arithmetic number, because the mean of its divisors is an integer number (158498847).

Almost surely, 2^316997693 is an apocalyptic number.

It is an amenable number.

316997693 is a deficient number, since it is larger than the sum of its proper divisors (1).

316997693 is an equidigital number, since it uses as much as digits as its factorization.

316997693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 53.

The square root of 316997693 is about 17804.4290276324. The cubic root of 316997693 is about 681.8445400628.

The spelling of 316997693 in words is "three hundred sixteen million, nine hundred ninety-seven thousand, six hundred ninety-three".