507989 has 4 divisors (see below), whose sum is σ = 513324. Its totient is φ = 502656.

The previous prime is 507979. The next prime is 508009. The reversal of 507989 is 989705.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 339889 + 168100 = 583^2 + 410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-507989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522 + ... + 2715.

It is an arithmetic number, because the mean of its divisors is an integer number (128331).

2⁵⁰⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

507989 is a deficient number, since it is larger than the sum of its proper divisors (5335).

507989 is an equidigital number, since it uses as much as digits as its factorization.

507989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 507989 is about 712.7334705204. The cubic root of 507989 is about 79.7905458405.

The spelling of 507989 in words is "five hundred seven thousand, nine hundred eighty-nine".