655617 has 8 divisors (see below), whose sum is σ = 885024. Its totient is φ = 431648.

The previous prime is 655601. The next prime is 655637. The reversal of 655617 is 716556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655617 - 2⁴ = 655601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655637) 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, 1068 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (110628).

2⁶⁵⁵⁶¹⁷ is an apocalyptic number.

It is an amenable number.

655617 is a deficient number, since it is larger than the sum of its proper divisors (229407).

655617 is a wasteful number, since it uses less digits than its factorization.

655617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719.

The product of its digits is 6300, while the sum is 30.

The square root of 655617 is about 809.7017969598. The cubic root of 655617 is about 86.8727165005.

The spelling of 655617 in words is "six hundred fifty-five thousand, six hundred seventeen".