238374991 has 2 divisors, whose sum is σ = 238374992. Its totient is φ = 238374990.

The previous prime is 238374989. The next prime is 238375001. The reversal of 238374991 is 199473832.

238374991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238374991 - 2¹ = 238374989 is a prime.

Together with 238374989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238374911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119187495 + 119187496.

It is an arithmetic number, because the mean of its divisors is an integer number (119187496).

Almost surely, 2^238374991 is an apocalyptic number.

238374991 is a deficient number, since it is larger than the sum of its proper divisors (1).

238374991 is an equidigital number, since it uses as much as digits as its factorization.

238374991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 238374991 is about 15439.3973651824. The cubic root of 238374991 is about 620.0407456746.

The spelling of 238374991 in words is "two hundred thirty-eight million, three hundred seventy-four thousand, nine hundred ninety-one".