238243771 has 2 divisors, whose sum is σ = 238243772. Its totient is φ = 238243770.

The previous prime is 238243769. The next prime is 238243801. The reversal of 238243771 is 177342832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238243771 - 2¹ = 238243769 is a prime.

Together with 238243769, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 238243771.

It is not a weakly prime, because it can be changed into another prime (238243751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119121885 + 119121886.

It is an arithmetic number, because the mean of its divisors is an integer number (119121886).

Almost surely, 2^238243771 is an apocalyptic number.

238243771 is a deficient number, since it is larger than the sum of its proper divisors (1).

238243771 is an equidigital number, since it uses as much as digits as its factorization.

238243771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 238243771 is about 15435.1472620121. The cubic root of 238243771 is about 619.9269520252.

The spelling of 238243771 in words is "two hundred thirty-eight million, two hundred forty-three thousand, seven hundred seventy-one".