238746257 has 2 divisors, whose sum is σ = 238746258. Its totient is φ = 238746256.

The previous prime is 238746223. The next prime is 238746271. The reversal of 238746257 is 752647832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198499921 + 40246336 = 14089^2 + 6344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238746257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238746217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119373128 + 119373129.

It is an arithmetic number, because the mean of its divisors is an integer number (119373129).

Almost surely, 2^238746257 is an apocalyptic number.

It is an amenable number.

238746257 is a deficient number, since it is larger than the sum of its proper divisors (1).

238746257 is an equidigital number, since it uses as much as digits as its factorization.

238746257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 238746257 is about 15451.4160192521. The cubic root of 238746257 is about 620.3624805437.

The spelling of 238746257 in words is "two hundred thirty-eight million, seven hundred forty-six thousand, two hundred fifty-seven".