655189 has 4 divisors (see below), whose sum is σ = 659680. Its totient is φ = 650700.

The previous prime is 655181. The next prime is 655211. The reversal of 655189 is 981556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655189 - 2³ = 655181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655181) 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, 2019 + ... + 2320.

It is an arithmetic number, because the mean of its divisors is an integer number (164920).

2⁶⁵⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

655189 is a deficient number, since it is larger than the sum of its proper divisors (4491).

655189 is a wasteful number, since it uses less digits than its factorization.

655189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490.

The product of its digits is 10800, while the sum is 34.

The square root of 655189 is about 809.4374589800. The cubic root of 655189 is about 86.8538082983.

The spelling of 655189 in words is "six hundred fifty-five thousand, one hundred eighty-nine".