316777493 has 2 divisors, whose sum is σ = 316777494. Its totient is φ = 316777492.

The previous prime is 316777471. The next prime is 316777501. The reversal of 316777493 is 394777613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262504804 + 54272689 = 16202^2 + 7367^2 .

It is an emirp because it is prime and its reverse (394777613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316777493 - 2²⁴ = 300000277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316777403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158388746 + 158388747.

It is an arithmetic number, because the mean of its divisors is an integer number (158388747).

Almost surely, 2^316777493 is an apocalyptic number.

It is an amenable number.

316777493 is a deficient number, since it is larger than the sum of its proper divisors (1).

316777493 is an equidigital number, since it uses as much as digits as its factorization.

316777493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 47.

The square root of 316777493 is about 17798.2440987868. The cubic root of 316777493 is about 681.6866241436.

The spelling of 316777493 in words is "three hundred sixteen million, seven hundred seventy-seven thousand, four hundred ninety-three".