238139 has 4 divisors (see below), whose sum is σ = 259800. Its totient is φ = 216480.

The previous prime is 238109. The next prime is 238141. The reversal of 238139 is 931832.

238139 = T₁₃₆ + T₁₃₇ + ... + T₁₅₇.

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

It is not a de Polignac number, because 238139 - 2⁸ = 237883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 238139.

It is not an unprimeable number, because it can be changed into a prime (238109) 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, 10814 + ... + 10835.

It is an arithmetic number, because the mean of its divisors is an integer number (64950).

2²³⁸¹³⁹ is an apocalyptic number.

238139 is a deficient number, since it is larger than the sum of its proper divisors (21661).

238139 is a wasteful number, since it uses less digits than its factorization.

238139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21660.

The product of its digits is 1296, while the sum is 26.

The square root of 238139 is about 487.9948770223. The cubic root of 238139 is about 61.9836064878.

The spelling of 238139 in words is "two hundred thirty-eight thousand, one hundred thirty-nine".