239555257 has 2 divisors, whose sum is σ = 239555258. Its totient is φ = 239555256.

The previous prime is 239555243. The next prime is 239555269. The reversal of 239555257 is 752555932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211877136 + 27678121 = 14556^2 + 5261^2 .

It is a cyclic number.

It is not a de Polignac number, because 239555257 - 2¹⁵ = 239522489 is a prime.

It is not a weakly prime, because it can be changed into another prime (239555227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119777628 + 119777629.

It is an arithmetic number, because the mean of its divisors is an integer number (119777629).

Almost surely, 2^239555257 is an apocalyptic number.

It is an amenable number.

239555257 is a deficient number, since it is larger than the sum of its proper divisors (1).

239555257 is an equidigital number, since it uses as much as digits as its factorization.

239555257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472500, while the sum is 43.

The square root of 239555257 is about 15477.5727102153. The cubic root of 239555257 is about 621.0623971918.

The spelling of 239555257 in words is "two hundred thirty-nine million, five hundred fifty-five thousand, two hundred fifty-seven".