613868 has 18 divisors (see below), whose sum is σ = 1113084. Its totient is φ = 296184.

The previous prime is 613861. The next prime is 613883. The reversal of 613868 is 868316.

Its product of digits (6912) is a multiple of the sum of its prime divisors (128).

It is not an unprimeable number, because it can be changed into a prime (613861) by changing a digit.

613868 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7355 + ... + 7437.

It is an arithmetic number, because the mean of its divisors is an integer number (61838).

2⁶¹³⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

613868 is a deficient number, since it is larger than the sum of its proper divisors (499216).

613868 is a wasteful number, since it uses less digits than its factorization.

613868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 128 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 613868 is about 783.4972878064. The cubic root of 613868 is about 84.9881413676.

The spelling of 613868 in words is "six hundred thirteen thousand, eight hundred sixty-eight".