658489 has 8 divisors (see below), whose sum is σ = 728840. Its totient is φ = 591408.

The previous prime is 658487. The next prime is 658507. The reversal of 658489 is 984856.

It can be written as a sum of positive squares in 4 ways, for example, as 144400 + 514089 = 380^2 + 717^2 .

It is not a de Polignac number, because 658489 - 2¹ = 658487 is a prime.

It is a Duffinian number.

658489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (658487) 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, 17779 + ... + 17815.

It is an arithmetic number, because the mean of its divisors is an integer number (91105).

2⁶⁵⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

658489 is a deficient number, since it is larger than the sum of its proper divisors (70351).

658489 is an frugal number, since it uses more digits than its factorization.

658489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 50 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 658489 is about 811.4733513801. The cubic root of 658489 is about 86.9993834457. Note that the first 3 decimals are identical.

Adding to 658489 its product of digits (69120), we get a square (727609 = 853²).

The spelling of 658489 in words is "six hundred fifty-eight thousand, four hundred eighty-nine".