506989 has 16 divisors (see below), whose sum is σ = 626688. Its totient is φ = 400752.

The previous prime is 506983. The next prime is 506993. The reversal of 506989 is 989605.

It is not a de Polignac number, because 506989 - 2⁷ = 506861 is a prime.

It is a super-2 number, since 2×506989² = 514075692242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7534 + ... + 7600.

It is an arithmetic number, because the mean of its divisors is an integer number (39168).

2⁵⁰⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

506989 is a deficient number, since it is larger than the sum of its proper divisors (119699).

506989 is a wasteful number, since it uses less digits than its factorization.

506989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 506989 is about 712.0316004223. The cubic root of 506989 is about 79.7381543122.

The spelling of 506989 in words is "five hundred six thousand, nine hundred eighty-nine".