658989 has 8 divisors (see below), whose sum is σ = 976320. Its totient is φ = 439308.

The previous prime is 658979. The next prime is 658991. The reversal of 658989 is 989856.

It is not a de Polignac number, because 658989 - 2⁹ = 658477 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 658989.

It is not an unprimeable number, because it can be changed into a prime (658919) 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, 12177 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (122040).

2⁶⁵⁸⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

658989 is a deficient number, since it is larger than the sum of its proper divisors (317331).

658989 is a wasteful number, since it uses less digits than its factorization.

658989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24416 (or 24410 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 658989 is about 811.7813745092. The cubic root of 658989 is about 87.0213978283.

The spelling of 658989 in words is "six hundred fifty-eight thousand, nine hundred eighty-nine".