238646791 has 2 divisors, whose sum is σ = 238646792. Its totient is φ = 238646790.

The previous prime is 238646789. The next prime is 238646809. The reversal of 238646791 is 197646832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238646791 - 2¹ = 238646789 is a prime.

Together with 238646789, 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 (238646491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119323395 + 119323396.

It is an arithmetic number, because the mean of its divisors is an integer number (119323396).

Almost surely, 2^238646791 is an apocalyptic number.

238646791 is a deficient number, since it is larger than the sum of its proper divisors (1).

238646791 is an equidigital number, since it uses as much as digits as its factorization.

238646791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 238646791 is about 15448.1970145386. The cubic root of 238646791 is about 620.2763171746.

The spelling of 238646791 in words is "two hundred thirty-eight million, six hundred forty-six thousand, seven hundred ninety-one".