238956257 has 2 divisors, whose sum is σ = 238956258. Its totient is φ = 238956256.

The previous prime is 238956247. The next prime is 238956271. The reversal of 238956257 is 752659832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152670736 + 86285521 = 12356^2 + 9289^2 .

It is a cyclic number.

It is not a de Polignac number, because 238956257 - 2¹⁶ = 238890721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238956227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119478128 + 119478129.

It is an arithmetic number, because the mean of its divisors is an integer number (119478129).

Almost surely, 2^238956257 is an apocalyptic number.

It is an amenable number.

238956257 is a deficient number, since it is larger than the sum of its proper divisors (1).

238956257 is an equidigital number, since it uses as much as digits as its factorization.

238956257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 238956257 is about 15458.2100192745. The cubic root of 238956257 is about 620.5443164734.

The spelling of 238956257 in words is "two hundred thirty-eight million, nine hundred fifty-six thousand, two hundred fifty-seven".