509316091 has 2 divisors, whose sum is σ = 509316092. Its totient is φ = 509316090.

The previous prime is 509316083. The next prime is 509316113. The reversal of 509316091 is 190613905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509316091 - 2³ = 509316083 is a prime.

It is not a weakly prime, because it can be changed into another prime (509316001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254658045 + 254658046.

It is an arithmetic number, because the mean of its divisors is an integer number (254658046).

Almost surely, 2^509316091 is an apocalyptic number.

509316091 is a deficient number, since it is larger than the sum of its proper divisors (1).

509316091 is an equidigital number, since it uses as much as digits as its factorization.

509316091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 509316091 is about 22568.0325017490. The cubic root of 509316091 is about 798.5996810428.

Adding to 509316091 its reverse (190613905), we get a palindrome (699929996).

The spelling of 509316091 in words is "five hundred nine million, three hundred sixteen thousand, ninety-one".