239613 has 16 divisors (see below), whose sum is σ = 357696. Its totient is φ = 141440.

The previous prime is 239611. The next prime is 239623. The reversal of 239613 is 316932.

It is a cyclic number.

It is not a de Polignac number, because 239613 - 2¹ = 239611 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681 + ... + 1817.

It is an arithmetic number, because the mean of its divisors is an integer number (22356).

2²³⁹⁶¹³ is an apocalyptic number.

It is an amenable number.

239613 is a deficient number, since it is larger than the sum of its proper divisors (118083).

239613 is a wasteful number, since it uses less digits than its factorization.

239613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its digits is 972, while the sum is 24.

The square root of 239613 is about 489.5028089807. The cubic root of 239613 is about 62.1112293996. Note that the first 3 decimals are identical.

The spelling of 239613 in words is "two hundred thirty-nine thousand, six hundred thirteen".