238434191 has 2 divisors, whose sum is σ = 238434192. Its totient is φ = 238434190.

The previous prime is 238434167. The next prime is 238434193. The reversal of 238434191 is 191434832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238434191 - 2⁶ = 238434127 is a prime.

Together with 238434193, 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 (238434193) 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, 119217095 + 119217096.

It is an arithmetic number, because the mean of its divisors is an integer number (119217096).

Almost surely, 2^238434191 is an apocalyptic number.

238434191 is a deficient number, since it is larger than the sum of its proper divisors (1).

238434191 is an equidigital number, since it uses as much as digits as its factorization.

238434191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 238434191 is about 15441.3144194398. The cubic root of 238434191 is about 620.0920700938.

The spelling of 238434191 in words is "two hundred thirty-eight million, four hundred thirty-four thousand, one hundred ninety-one".