255689963 has 4 divisors (see below), whose sum is σ = 258326040. Its totient is φ = 253053888.

The previous prime is 255689939. The next prime is 255689971. The reversal of 255689963 is 369986552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255689963 - 2²² = 251495659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255689933) 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 in 3 ways as a sum of consecutive naturals, for example, 1317893 + ... + 1318086.

It is an arithmetic number, because the mean of its divisors is an integer number (64581510).

Almost surely, 2^255689963 is an apocalyptic number.

255689963 is a deficient number, since it is larger than the sum of its proper divisors (2636077).

255689963 is an equidigital number, since it uses as much as digits as its factorization.

255689963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636076.

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

The square root of 255689963 is about 15990.3084085330. The cubic root of 255689963 is about 634.7039875201.

It can be divided in two parts, 255689 and 963, that added together give a palindrome (256652).

The spelling of 255689963 in words is "two hundred fifty-five million, six hundred eighty-nine thousand, nine hundred sixty-three".