238761791 has 2 divisors, whose sum is σ = 238761792. Its totient is φ = 238761790.

The previous prime is 238761769. The next prime is 238761797. The reversal of 238761791 is 197167832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238761791 - 2¹⁴ = 238745407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238761797) 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, 119380895 + 119380896.

It is an arithmetic number, because the mean of its divisors is an integer number (119380896).

Almost surely, 2^238761791 is an apocalyptic number.

238761791 is a deficient number, since it is larger than the sum of its proper divisors (1).

238761791 is an equidigital number, since it uses as much as digits as its factorization.

238761791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 238761791 is about 15451.9186834516. The cubic root of 238761791 is about 620.3759348583.

The spelling of 238761791 in words is "two hundred thirty-eight million, seven hundred sixty-one thousand, seven hundred ninety-one".