509984669 has 2 divisors, whose sum is σ = 509984670. Its totient is φ = 509984668.

The previous prime is 509984659. The next prime is 509984723. The reversal of 509984669 is 966489905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277056025 + 232928644 = 16645^2 + 15262^2 .

It is a cyclic number.

It is not a de Polignac number, because 509984669 - 2²⁰ = 508936093 is a prime.

It is a super-2 number, since 2×509984669² = 520168725230079122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509984659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254992334 + 254992335.

It is an arithmetic number, because the mean of its divisors is an integer number (254992335).

Almost surely, 2^509984669 is an apocalyptic number.

It is an amenable number.

509984669 is a deficient number, since it is larger than the sum of its proper divisors (1).

509984669 is an equidigital number, since it uses as much as digits as its factorization.

509984669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The square root of 509984669 is about 22582.8401446762. The cubic root of 509984669 is about 798.9489682074.

The spelling of 509984669 in words is "five hundred nine million, nine hundred eighty-four thousand, six hundred sixty-nine".