255934891 has 2 divisors, whose sum is σ = 255934892. Its totient is φ = 255934890.

The previous prime is 255934849. The next prime is 255934919. The reversal of 255934891 is 198439552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255934891 - 2¹⁵ = 255902123 is a prime.

It is not a weakly prime, because it can be changed into another prime (255934801) 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, 127967445 + 127967446.

It is an arithmetic number, because the mean of its divisors is an integer number (127967446).

Almost surely, 2^255934891 is an apocalyptic number.

255934891 is a deficient number, since it is larger than the sum of its proper divisors (1).

255934891 is an equidigital number, since it uses as much as digits as its factorization.

255934891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 46.

The square root of 255934891 is about 15997.9652143640. The cubic root of 255934891 is about 634.9065859652.

The spelling of 255934891 in words is "two hundred fifty-five million, nine hundred thirty-four thousand, eight hundred ninety-one".