509869799 has 8 divisors (see below), whose sum is σ = 526254720. Its totient is φ = 493743096.

The previous prime is 509869783. The next prime is 509869813. The reversal of 509869799 is 997968905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 509869799 - 2⁴ = 509869783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509869099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60539 + ... + 68444.

It is an arithmetic number, because the mean of its divisors is an integer number (65781840).

Almost surely, 2^509869799 is an apocalyptic number.

509869799 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

509869799 is a deficient number, since it is larger than the sum of its proper divisors (16384921).

509869799 is a wasteful number, since it uses less digits than its factorization.

509869799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129109.

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

The square root of 509869799 is about 22580.2966986707. The cubic root of 509869799 is about 798.8889780646. Note that the first 3 decimals are identical.

The spelling of 509869799 in words is "five hundred nine million, eight hundred sixty-nine thousand, seven hundred ninety-nine".