655653 has 4 divisors (see below), whose sum is σ = 874208. Its totient is φ = 437100.

The previous prime is 655651. The next prime is 655657. The reversal of 655653 is 356556.

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 not a de Polignac number, because 655653 - 2¹ = 655651 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 655653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655651) 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, 109273 + ... + 109278.

It is an arithmetic number, because the mean of its divisors is an integer number (218552).

2⁶⁵⁵⁶⁵³ is an apocalyptic number.

It is an amenable number.

655653 is a deficient number, since it is larger than the sum of its proper divisors (218555).

655653 is a wasteful number, since it uses less digits than its factorization.

655653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218554.

The product of its digits is 13500, while the sum is 30.

The square root of 655653 is about 809.7240270611. The cubic root of 655653 is about 86.8743065348.

The spelling of 655653 in words is "six hundred fifty-five thousand, six hundred fifty-three".