381000239 has 2 divisors, whose sum is σ = 381000240. Its totient is φ = 381000238.

The previous prime is 381000227. The next prime is 381000241. The reversal of 381000239 is 932000183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381000239 is a prime.

It is a super-2 number, since 2×381000239² = 290322364236114242, which contains 22 as substring.

Together with 381000241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381000259) 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 as a sum of consecutive naturals, namely, 190500119 + 190500120.

It is an arithmetic number, because the mean of its divisors is an integer number (190500120).

Almost surely, 2^381000239 is an apocalyptic number.

381000239 is a deficient number, since it is larger than the sum of its proper divisors (1).

381000239 is an equidigital number, since it uses as much as digits as its factorization.

381000239 is an odious number, because the sum of its binary digits is odd.

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

The square root of 381000239 is about 19519.2274181126. The cubic root of 381000239 is about 724.9506040068.

The spelling of 381000239 in words is "three hundred eighty-one million, two hundred thirty-nine", and thus it is an aban number.