255863969 has 2 divisors, whose sum is σ = 255863970. Its totient is φ = 255863968.

The previous prime is 255863963. The next prime is 255863977. The reversal of 255863969 is 969368552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249166225 + 6697744 = 15785^2 + 2588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255863969 is a prime.

It is a super-2 number, since 2×255863969² = 130932741264865922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255863969.

It is not a weakly prime, because it can be changed into another prime (255863963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127931984 + 127931985.

It is an arithmetic number, because the mean of its divisors is an integer number (127931985).

Almost surely, 2^255863969 is an apocalyptic number.

It is an amenable number.

255863969 is a deficient number, since it is larger than the sum of its proper divisors (1).

255863969 is an equidigital number, since it uses as much as digits as its factorization.

255863969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 53.

The square root of 255863969 is about 15995.7484663894. The cubic root of 255863969 is about 634.8479343231.

The spelling of 255863969 in words is "two hundred fifty-five million, eight hundred sixty-three thousand, nine hundred sixty-nine".