168613 has 4 divisors (see below), whose sum is σ = 175968. Its totient is φ = 161260.

The previous prime is 168601. The next prime is 168617. The reversal of 168613 is 316861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168617) 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, 3643 + ... + 3688.

It is an arithmetic number, because the mean of its divisors is an integer number (43992).

2¹⁶⁸⁶¹³ is an apocalyptic number.

It is an amenable number.

168613 is a deficient number, since it is larger than the sum of its proper divisors (7355).

168613 is an equidigital number, since it uses as much as digits as its factorization.

168613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7354.

The product of its digits is 864, while the sum is 25.

The square root of 168613 is about 410.6251331811. The cubic root of 168613 is about 55.2455139919.

The spelling of 168613 in words is "one hundred sixty-eight thousand, six hundred thirteen".