318875740693 has 2 divisors, whose sum is σ = 318875740694. Its totient is φ = 318875740692.

The previous prime is 318875740621. The next prime is 318875740723. The reversal of 318875740693 is 396047578813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318539458449 + 336282244 = 564393^2 + 18338^2 .

It is a cyclic number.

It is not a de Polignac number, because 318875740693 - 2²⁵ = 318842186261 is a prime.

It is a super-2 number, since 2×318875740693² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318875740613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159437870346 + 159437870347.

It is an arithmetic number, because the mean of its divisors is an integer number (159437870347).

Almost surely, 2^318875740693 is an apocalyptic number.

It is an amenable number.

318875740693 is a deficient number, since it is larger than the sum of its proper divisors (1).

318875740693 is an equidigital number, since it uses as much as digits as its factorization.

318875740693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 318875740693 in words is "three hundred eighteen billion, eight hundred seventy-five million, seven hundred forty thousand, six hundred ninety-three".