509969375 has 20 divisors (see below), whose sum is σ = 657839424. Its totient is φ = 394800000.

The previous prime is 509969371. The next prime is 509969381. The reversal of 509969375 is 573969905.

It is not a de Polignac number, because 509969375 - 2² = 509969371 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 (509969371) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6215 + ... + 32535.

Almost surely, 2^509969375 is an apocalyptic number.

509969375 is a deficient number, since it is larger than the sum of its proper divisors (147870049).

509969375 is an equidigital number, since it uses as much as digits as its factorization.

509969375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26372 (or 26357 counting only the distinct ones).

The product of its (nonzero) digits is 2296350, while the sum is 53.

The square root of 509969375 is about 22582.5015221963. The cubic root of 509969375 is about 798.9409815310.

The spelling of 509969375 in words is "five hundred nine million, nine hundred sixty-nine thousand, three hundred seventy-five".