238619257 has 2 divisors, whose sum is σ = 238619258. Its totient is φ = 238619256.

The previous prime is 238619239. The next prime is 238619291. The reversal of 238619257 is 752916832.

238619257 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 can be written as a sum of positive squares in only one way, i.e., 225630441 + 12988816 = 15021^2 + 3604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238619257 is a prime.

It is a super-2 number, since 2×238619257² = 113878299622464098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238619207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119309628 + 119309629.

It is an arithmetic number, because the mean of its divisors is an integer number (119309629).

Almost surely, 2^238619257 is an apocalyptic number.

It is an amenable number.

238619257 is a deficient number, since it is larger than the sum of its proper divisors (1).

238619257 is an equidigital number, since it uses as much as digits as its factorization.

238619257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 238619257 is about 15447.3058168731. The cubic root of 238619257 is about 620.2524613541.

The spelling of 238619257 in words is "two hundred thirty-eight million, six hundred nineteen thousand, two hundred fifty-seven".