509304431 has 2 divisors, whose sum is σ = 509304432. Its totient is φ = 509304430.

The previous prime is 509304413. The next prime is 509304437. The reversal of 509304431 is 134403905.

Together with previous prime (509304413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509304431 - 2²² = 505110127 is a prime.

It is a super-2 number, since 2×509304431² = 518782006872467522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 509304394 and 509304403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509304437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254652215 + 254652216.

It is an arithmetic number, because the mean of its divisors is an integer number (254652216).

Almost surely, 2^509304431 is an apocalyptic number.

509304431 is a deficient number, since it is larger than the sum of its proper divisors (1).

509304431 is an equidigital number, since it uses as much as digits as its factorization.

509304431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 509304431 is about 22567.7741702632. The cubic root of 509304431 is about 798.5935867637.

The spelling of 509304431 in words is "five hundred nine million, three hundred four thousand, four hundred thirty-one".