613655 has 16 divisors (see below), whose sum is σ = 855360. Its totient is φ = 413952.

The previous prime is 613651. The next prime is 613661. The reversal of 613655 is 556316.

It is not a de Polignac number, because 613655 - 2² = 613651 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 613655.

It is not an unprimeable number, because it can be changed into a prime (613651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3017 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2⁶¹³⁶⁵⁵ is an apocalyptic number.

613655 is a deficient number, since it is larger than the sum of its proper divisors (241705).

613655 is a wasteful number, since it uses less digits than its factorization.

613655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298.

The product of its digits is 2700, while the sum is 26.

The square root of 613655 is about 783.3613470168. The cubic root of 613655 is about 84.9783104982.

The spelling of 613655 in words is "six hundred thirteen thousand, six hundred fifty-five".