239881 has 4 divisors (see below), whose sum is σ = 242452. Its totient is φ = 237312.

The previous prime is 239879. The next prime is 239893. The reversal of 239881 is 188932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 95481 = 380^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 239881 - 2¹ = 239879 is a prime.

It is a super-2 number, since 2×239881² = 115085788322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239831) 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, 1140 + ... + 1333.

It is an arithmetic number, because the mean of its divisors is an integer number (60613).

2²³⁹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

239881 is a deficient number, since it is larger than the sum of its proper divisors (2571).

239881 is an equidigital number, since it uses as much as digits as its factorization.

239881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570.

The product of its digits is 3456, while the sum is 31.

The square root of 239881 is about 489.7764796313. The cubic root of 239881 is about 62.1343772913.

The spelling of 239881 in words is "two hundred thirty-nine thousand, eight hundred eighty-one".