238788191 has 2 divisors, whose sum is σ = 238788192. Its totient is φ = 238788190.

The previous prime is 238788169. The next prime is 238788217. The reversal of 238788191 is 191887832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238788191 - 2²⁶ = 171679327 is a prime.

It is a super-2 number, since 2×238788191² = 114039600322104962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238788131) 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, 119394095 + 119394096.

It is an arithmetic number, because the mean of its divisors is an integer number (119394096).

Almost surely, 2^238788191 is an apocalyptic number.

238788191 is a deficient number, since it is larger than the sum of its proper divisors (1).

238788191 is an equidigital number, since it uses as much as digits as its factorization.

238788191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 47.

The square root of 238788191 is about 15452.7729226828. The cubic root of 238788191 is about 620.3987990989.

The spelling of 238788191 in words is "two hundred thirty-eight million, seven hundred eighty-eight thousand, one hundred ninety-one".