238189439 has 2 divisors, whose sum is σ = 238189440. Its totient is φ = 238189438.

The previous prime is 238189429. The next prime is 238189447. The reversal of 238189439 is 934981832.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238189439 - 2⁸ = 238189183 is a prime.

It is a super-2 number, since 2×238189439² = 113468417702269442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 238189393 and 238189402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238189429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119094719 + 119094720.

It is an arithmetic number, because the mean of its divisors is an integer number (119094720).

Almost surely, 2^238189439 is an apocalyptic number.

238189439 is a deficient number, since it is larger than the sum of its proper divisors (1).

238189439 is an equidigital number, since it uses as much as digits as its factorization.

238189439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 238189439 is about 15433.3871525340. The cubic root of 238189439 is about 619.8798232213.

The spelling of 238189439 in words is "two hundred thirty-eight million, one hundred eighty-nine thousand, four hundred thirty-nine".