238884991 has 2 divisors, whose sum is σ = 238884992. Its totient is φ = 238884990.

The previous prime is 238884953. The next prime is 238885001. The reversal of 238884991 is 199488832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238884991 - 2¹⁵ = 238852223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238884941) 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, 119442495 + 119442496.

It is an arithmetic number, because the mean of its divisors is an integer number (119442496).

Almost surely, 2^238884991 is an apocalyptic number.

238884991 is a deficient number, since it is larger than the sum of its proper divisors (1).

238884991 is an equidigital number, since it uses as much as digits as its factorization.

238884991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 52.

The square root of 238884991 is about 15455.9047292612. The cubic root of 238884991 is about 620.4826202325.

The spelling of 238884991 in words is "two hundred thirty-eight million, eight hundred eighty-four thousand, nine hundred ninety-one".