239236139 has 2 divisors, whose sum is σ = 239236140. Its totient is φ = 239236138.

The previous prime is 239236103. The next prime is 239236169. The reversal of 239236139 is 931632932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239236139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (239236169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119618069 + 119618070.

It is an arithmetic number, because the mean of its divisors is an integer number (119618070).

Almost surely, 2^239236139 is an apocalyptic number.

239236139 is a deficient number, since it is larger than the sum of its proper divisors (1).

239236139 is an equidigital number, since it uses as much as digits as its factorization.

239236139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 38.

The square root of 239236139 is about 15467.2602292714. The cubic root of 239236139 is about 620.7864966704.

The spelling of 239236139 in words is "two hundred thirty-nine million, two hundred thirty-six thousand, one hundred thirty-nine".