239839131 has 16 divisors (see below), whose sum is σ = 368825600. Its totient is φ = 135792288.

The previous prime is 239839121. The next prime is 239839139. The reversal of 239839131 is 131938932.

It is not a de Polignac number, because 239839131 - 2⁵ = 239839099 is a prime.

It is a super-2 number, since 2×239839131² = 115045617517670322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 239839131.

It is not an unprimeable number, because it can be changed into a prime (239839139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50101 + ... + 54678.

It is an arithmetic number, because the mean of its divisors is an integer number (23051600).

Almost surely, 2^239839131 is an apocalyptic number.

239839131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

239839131 is a deficient number, since it is larger than the sum of its proper divisors (128986469).

239839131 is a wasteful number, since it uses less digits than its factorization.

239839131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104898.

The product of its digits is 34992, while the sum is 39.

The square root of 239839131 is about 15486.7404898513. The cubic root of 239839131 is about 621.3076208823.

The spelling of 239839131 in words is "two hundred thirty-nine million, eight hundred thirty-nine thousand, one hundred thirty-one".