655109 has 16 divisors (see below), whose sum is σ = 844032. Its totient is φ = 494208.

The previous prime is 655103. The next prime is 655111. The reversal of 655109 is 901556.

It is not a de Polignac number, because 655109 - 2⁸ = 654853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655103) 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, 1937 + ... + 2249.

It is an arithmetic number, because the mean of its divisors is an integer number (52752).

2⁶⁵⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

655109 is a deficient number, since it is larger than the sum of its proper divisors (188923).

655109 is a wasteful number, since it uses less digits than its factorization.

655109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 655109 is about 809.3880404355. The cubic root of 655109 is about 86.8502731415.

The spelling of 655109 in words is "six hundred fifty-five thousand, one hundred nine".