163239 has 4 divisors (see below), whose sum is σ = 217656. Its totient is φ = 108824.

The previous prime is 163223. The next prime is 163243. The reversal of 163239 is 932361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163239 - 2⁴ = 163223 is a prime.

It is a super-2 number, since 2×163239² = 53293942242, which contains 22 as substring.

It is a D-number.

163239 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163249) 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, 27204 + ... + 27209.

It is an arithmetic number, because the mean of its divisors is an integer number (54414).

2¹⁶³²³⁹ is an apocalyptic number.

163239 is a deficient number, since it is larger than the sum of its proper divisors (54417).

163239 is an equidigital number, since it uses as much as digits as its factorization.

163239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54416.

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

The square root of 163239 is about 404.0284643438. The cubic root of 163239 is about 54.6522410545.

The spelling of 163239 in words is "one hundred sixty-three thousand, two hundred thirty-nine".