239906 has 4 divisors (see below), whose sum is σ = 359862. Its totient is φ = 119952.

The previous prime is 239893. The next prime is 239929. The reversal of 239906 is 609932.

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

It can be written as a sum of positive squares in only one way, i.e., 152881 + 87025 = 391^2 + 295^2 .

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

239906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59975 + ... + 59978.

2²³⁹⁹⁰⁶ is an apocalyptic number.

239906 is a deficient number, since it is larger than the sum of its proper divisors (119956).

239906 is a wasteful number, since it uses less digits than its factorization.

239906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119955.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 239906 is about 489.8020008126. The cubic root of 239906 is about 62.1365357303.

The spelling of 239906 in words is "two hundred thirty-nine thousand, nine hundred six".