255993923 has 2 divisors, whose sum is σ = 255993924. Its totient is φ = 255993922.

The previous prime is 255993901. The next prime is 255993931. The reversal of 255993923 is 329399552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255993923 - 2²⁰ = 254945347 is a prime.

It is a super-2 number, since 2×255993923² = 131065777225859858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255993223) 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, 127996961 + 127996962.

It is an arithmetic number, because the mean of its divisors is an integer number (127996962).

Almost surely, 2^255993923 is an apocalyptic number.

255993923 is a deficient number, since it is larger than the sum of its proper divisors (1).

255993923 is an equidigital number, since it uses as much as digits as its factorization.

255993923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 656100, while the sum is 47.

The square root of 255993923 is about 15999.8100926230. The cubic root of 255993923 is about 634.9553964578.

The spelling of 255993923 in words is "two hundred fifty-five million, nine hundred ninety-three thousand, nine hundred twenty-three".