613508 has 12 divisors (see below), whose sum is σ = 1227072. Its totient is φ = 262920.

The previous prime is 613507. The next prime is 613523. The reversal of 613508 is 805316.

613508 is an admirable number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (613507) 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, 10928 + ... + 10983.

It is an arithmetic number, because the mean of its divisors is an integer number (102256).

2⁶¹³⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

613508 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613508 is a wasteful number, since it uses less digits than its factorization.

613508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21922 (or 21920 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 613508 is about 783.2675149654. The cubic root of 613508 is about 84.9715244870.

The spelling of 613508 in words is "six hundred thirteen thousand, five hundred eight".