238983257 has 2 divisors, whose sum is σ = 238983258. Its totient is φ = 238983256.

The previous prime is 238983233. The next prime is 238983289. The reversal of 238983257 is 752389832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169494361 + 69488896 = 13019^2 + 8336^2 .

It is a cyclic number.

It is not a de Polignac number, because 238983257 - 2⁸ = 238983001 is a prime.

It is a super-2 number, since 2×238983257² = 114225994252656098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238982257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119491628 + 119491629.

It is an arithmetic number, because the mean of its divisors is an integer number (119491629).

Almost surely, 2^238983257 is an apocalyptic number.

It is an amenable number.

238983257 is a deficient number, since it is larger than the sum of its proper divisors (1).

238983257 is an equidigital number, since it uses as much as digits as its factorization.

238983257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 238983257 is about 15459.0833169370. The cubic root of 238983257 is about 620.5676876485.

The spelling of 238983257 in words is "two hundred thirty-eight million, nine hundred eighty-three thousand, two hundred fifty-seven".