509975 has 6 divisors (see below), whose sum is σ = 632400. Its totient is φ = 407960.

The previous prime is 509963. The next prime is 509989. The reversal of 509975 is 579905.

It is not a de Polignac number, because 509975 - 2⁴ = 509959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10175 + ... + 10224.

It is an arithmetic number, because the mean of its divisors is an integer number (105400).

2⁵⁰⁹⁹⁷⁵ is an apocalyptic number.

509975 is a deficient number, since it is larger than the sum of its proper divisors (122425).

509975 is a wasteful number, since it uses less digits than its factorization.

509975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20409 (or 20404 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 35.

The square root of 509975 is about 714.1253391387. The cubic root of 509975 is about 79.8943918980.

The spelling of 509975 in words is "five hundred nine thousand, nine hundred seventy-five".