255999983 has 2 divisors, whose sum is σ = 255999984. Its totient is φ = 255999982.

The previous prime is 255999979. The next prime is 256000001. The reversal of 255999983 is 389999552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255999983 - 2² = 255999979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255999973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127999991 + 127999992.

It is an arithmetic number, because the mean of its divisors is an integer number (127999992).

Almost surely, 2^255999983 is an apocalyptic number.

255999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

255999983 is an equidigital number, since it uses as much as digits as its factorization.

255999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7873200, while the sum is 59.

The square root of 255999983 is about 15999.9994687500. Note that the first 3 decimals coincide. The cubic root of 255999983 is about 634.9604067322.

The spelling of 255999983 in words is "two hundred fifty-five million, nine hundred ninety-nine thousand, nine hundred eighty-three".