239143 has 4 divisors (see below), whose sum is σ = 241920. Its totient is φ = 236368.

The previous prime is 239137. The next prime is 239147. The reversal of 239143 is 341932.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239143 is a prime.

It is a Duffinian 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 (239147) 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, 1255 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2²³⁹¹⁴³ is an apocalyptic number.

239143 is a deficient number, since it is larger than the sum of its proper divisors (2777).

239143 is an equidigital number, since it uses as much as digits as its factorization.

239143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776.

The product of its digits is 648, while the sum is 22.

The square root of 239143 is about 489.0224943701. The cubic root of 239143 is about 62.0705925038.

Subtracting from 239143 its sum of digits (22), we obtain a square (239121 = 489²).

The spelling of 239143 in words is "two hundred thirty-nine thousand, one hundred forty-three".