509243 has 8 divisors (see below), whose sum is σ = 607488. Its totient is φ = 417384.

The previous prime is 509239. The next prime is 509263. The reversal of 509243 is 342905.

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 509243 - 2² = 509239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (509203) 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, 1421 + ... + 1742.

It is an arithmetic number, because the mean of its divisors is an integer number (75936).

2⁵⁰⁹²⁴³ is an apocalyptic number.

509243 is a deficient number, since it is larger than the sum of its proper divisors (98245).

509243 is a wasteful number, since it uses less digits than its factorization.

509243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 509243 is about 713.6126400226. The cubic root of 509243 is about 79.8561477366.

The spelling of 509243 in words is "five hundred nine thousand, two hundred forty-three".