495380990917 has 2 divisors, whose sum is σ = 495380990918. Its totient is φ = 495380990916.

The previous prime is 495380990893. The next prime is 495380990921. The reversal of 495380990917 is 719099083594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372375771076 + 123005219841 = 610226^2 + 350721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495380990917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (495380990017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247690495458 + 247690495459.

It is an arithmetic number, because the mean of its divisors is an integer number (247690495459).

Almost surely, 2^495380990917 is an apocalyptic number.

It is an amenable number.

495380990917 is a deficient number, since it is larger than the sum of its proper divisors (1).

495380990917 is an equidigital number, since it uses as much as digits as its factorization.

495380990917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22044960, while the sum is 64.

The spelling of 495380990917 in words is "four hundred ninety-five billion, three hundred eighty million, nine hundred ninety thousand, nine hundred seventeen".