239257087 has 2 divisors, whose sum is σ = 239257088. Its totient is φ = 239257086.

The previous prime is 239257043. The next prime is 239257111. The reversal of 239257087 is 780752932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239257087 - 2²³ = 230868479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239257037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119628543 + 119628544.

It is an arithmetic number, because the mean of its divisors is an integer number (119628544).

Almost surely, 2^239257087 is an apocalyptic number.

239257087 is a deficient number, since it is larger than the sum of its proper divisors (1).

239257087 is an equidigital number, since it uses as much as digits as its factorization.

239257087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 239257087 is about 15467.9373867365. The cubic root of 239257087 is about 620.8046152484.

The spelling of 239257087 in words is "two hundred thirty-nine million, two hundred fifty-seven thousand, eighty-seven".