509949887959 has 2 divisors, whose sum is σ = 509949887960. Its totient is φ = 509949887958.

The previous prime is 509949887933. The next prime is 509949887987. The reversal of 509949887959 is 959788949905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509949887959 - 2²⁵ = 509916333527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509949887989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254974943979 + 254974943980.

It is an arithmetic number, because the mean of its divisors is an integer number (254974943980).

Almost surely, 2^509949887959 is an apocalyptic number.

509949887959 is a deficient number, since it is larger than the sum of its proper divisors (1).

509949887959 is an equidigital number, since it uses as much as digits as its factorization.

509949887959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2645395200, while the sum is 82.

The spelling of 509949887959 in words is "five hundred nine billion, nine hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred fifty-nine".