100239 has 4 divisors (see below), whose sum is σ = 133656. Its totient is φ = 66824.

The previous prime is 100237. The next prime is 100267. The reversal of 100239 is 932001.

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 100239 - 2¹ = 100237 is a prime.

It is a D-number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100237) 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, 16704 + ... + 16709.

It is an arithmetic number, because the mean of its divisors is an integer number (33414).

2¹⁰⁰²³⁹ is an apocalyptic number.

100239 is a deficient number, since it is larger than the sum of its proper divisors (33417).

100239 is an equidigital number, since it uses as much as digits as its factorization.

100239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33416.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 100239 is about 316.6054326761. The cubic root of 100239 is about 46.4528369071.

The spelling of 100239 in words is "one hundred thousand, two hundred thirty-nine".