238871911 has 2 divisors, whose sum is σ = 238871912. Its totient is φ = 238871910.

The previous prime is 238871891. The next prime is 238871929. The reversal of 238871911 is 119178832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238871911 - 2¹⁵ = 238839143 is a prime.

It is a super-3 number, since 3×238871911³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238871011) 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, 119435955 + 119435956.

It is an arithmetic number, because the mean of its divisors is an integer number (119435956).

Almost surely, 2^238871911 is an apocalyptic number.

238871911 is a deficient number, since it is larger than the sum of its proper divisors (1).

238871911 is an equidigital number, since it uses as much as digits as its factorization.

238871911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 238871911 is about 15455.4815842147. The cubic root of 238871911 is about 620.4712953117.

The spelling of 238871911 in words is "two hundred thirty-eight million, eight hundred seventy-one thousand, nine hundred eleven".