509680631 has 2 divisors, whose sum is σ = 509680632. Its totient is φ = 509680630.

The previous prime is 509680609. The next prime is 509680649. The reversal of 509680631 is 136086905.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509680631 is a prime.

It is a super-2 number, since 2×509680631² = 519548691233116322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509680651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254840315 + 254840316.

It is an arithmetic number, because the mean of its divisors is an integer number (254840316).

Almost surely, 2^509680631 is an apocalyptic number.

509680631 is a deficient number, since it is larger than the sum of its proper divisors (1).

509680631 is an equidigital number, since it uses as much as digits as its factorization.

509680631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 509680631 is about 22576.1075254349. The cubic root of 509680631 is about 798.7901666138.

The spelling of 509680631 in words is "five hundred nine million, six hundred eighty thousand, six hundred thirty-one".