672831517 has 2 divisors, whose sum is σ = 672831518. Its totient is φ = 672831516.

The previous prime is 672831451. The next prime is 672831521. The reversal of 672831517 is 715138276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672157476 + 674041 = 25926^2 + 821^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672831517 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672831517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672831527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336415758 + 336415759.

It is an arithmetic number, because the mean of its divisors is an integer number (336415759).

Almost surely, 2^672831517 is an apocalyptic number.

It is an amenable number.

672831517 is a deficient number, since it is larger than the sum of its proper divisors (1).

672831517 is an equidigital number, since it uses as much as digits as its factorization.

672831517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 672831517 is about 25938.9960676970. The cubic root of 672831517 is about 876.2649533367.

The spelling of 672831517 in words is "six hundred seventy-two million, eight hundred thirty-one thousand, five hundred seventeen".