238806257 has 2 divisors, whose sum is σ = 238806258. Its totient is φ = 238806256.

The previous prime is 238806241. The next prime is 238806289. The reversal of 238806257 is 752608832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223681936 + 15124321 = 14956^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 238806257 - 2⁴ = 238806241 is a prime.

It is not a weakly prime, because it can be changed into another prime (238806457) 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, 119403128 + 119403129.

It is an arithmetic number, because the mean of its divisors is an integer number (119403129).

Almost surely, 2^238806257 is an apocalyptic number.

It is an amenable number.

238806257 is a deficient number, since it is larger than the sum of its proper divisors (1).

238806257 is an equidigital number, since it uses as much as digits as its factorization.

238806257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 238806257 is about 15453.3574669067. The cubic root of 238806257 is about 620.4144445432.

The spelling of 238806257 in words is "two hundred thirty-eight million, eight hundred six thousand, two hundred fifty-seven".