239234257 has 2 divisors, whose sum is σ = 239234258. Its totient is φ = 239234256.

The previous prime is 239234249. The next prime is 239234269. The reversal of 239234257 is 752432932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234671761 + 4562496 = 15319^2 + 2136^2 .

It is a cyclic number.

It is not a de Polignac number, because 239234257 - 2³ = 239234249 is a prime.

It is not a weakly prime, because it can be changed into another prime (239234227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119617128 + 119617129.

It is an arithmetic number, because the mean of its divisors is an integer number (119617129).

Almost surely, 2^239234257 is an apocalyptic number.

It is an amenable number.

239234257 is a deficient number, since it is larger than the sum of its proper divisors (1).

239234257 is an equidigital number, since it uses as much as digits as its factorization.

239234257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 239234257 is about 15467.1993909693. The cubic root of 239234257 is about 620.7848688181.

The spelling of 239234257 in words is "two hundred thirty-nine million, two hundred thirty-four thousand, two hundred fifty-seven".