509369149 has 2 divisors, whose sum is σ = 509369150. Its totient is φ = 509369148.

The previous prime is 509369143. The next prime is 509369171. The reversal of 509369149 is 941963905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467856900 + 41512249 = 21630^2 + 6443^2 .

It is a cyclic number.

It is not a de Polignac number, because 509369149 - 2²³ = 500980541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509369099 and 509369108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509369143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254684574 + 254684575.

It is an arithmetic number, because the mean of its divisors is an integer number (254684575).

Almost surely, 2^509369149 is an apocalyptic number.

It is an amenable number.

509369149 is a deficient number, since it is larger than the sum of its proper divisors (1).

509369149 is an equidigital number, since it uses as much as digits as its factorization.

509369149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 509369149 is about 22569.2079834451. The cubic root of 509369149 is about 798.6274114519.

The spelling of 509369149 in words is "five hundred nine million, three hundred sixty-nine thousand, one hundred forty-nine".