655749 has 16 divisors (see below), whose sum is σ = 984000. Its totient is φ = 431568.

The previous prime is 655727. The next prime is 655757. The reversal of 655749 is 947556.

It is not a de Polignac number, because 655749 - 2⁵ = 655717 is a prime.

Its product of digits (37800) is a multiple of the sum of its prime divisors (315).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3942 + ... + 4104.

It is an arithmetic number, because the mean of its divisors is an integer number (61500).

2⁶⁵⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

655749 is a deficient number, since it is larger than the sum of its proper divisors (328251).

655749 is a wasteful number, since it uses less digits than its factorization.

655749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 315 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 655749 is about 809.7833043475. The cubic root of 655749 is about 86.8785463418.

It can be divided in two parts, 6 and 55749, that added together give a palindrome (55755).

The spelling of 655749 in words is "six hundred fifty-five thousand, seven hundred forty-nine".