509679899 has 2 divisors, whose sum is σ = 509679900. Its totient is φ = 509679898.

The previous prime is 509679893. The next prime is 509679913. The reversal of 509679899 is 998976905.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509679899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (509679893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254839949 + 254839950.

It is an arithmetic number, because the mean of its divisors is an integer number (254839950).

Almost surely, 2^509679899 is an apocalyptic number.

509679899 is a deficient number, since it is larger than the sum of its proper divisors (1).

509679899 is an equidigital number, since it uses as much as digits as its factorization.

509679899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11022480, while the sum is 62.

The square root of 509679899 is about 22576.0913135999. The cubic root of 509679899 is about 798.7897842079.

The spelling of 509679899 in words is "five hundred nine million, six hundred seventy-nine thousand, eight hundred ninety-nine".