255689123 has 4 divisors (see below), whose sum is σ = 256214640. Its totient is φ = 255163608.

The previous prime is 255689117. The next prime is 255689141. The reversal of 255689123 is 321986552.

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 255689123 - 2⁶ = 255689059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255689153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262028 + ... + 263001.

It is an arithmetic number, because the mean of its divisors is an integer number (64053660).

Almost surely, 2^255689123 is an apocalyptic number.

255689123 is a deficient number, since it is larger than the sum of its proper divisors (525517).

255689123 is an equidigital number, since it uses as much as digits as its factorization.

255689123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525516.

The product of its digits is 129600, while the sum is 41.

The square root of 255689123 is about 15990.2821426015. The cubic root of 255689123 is about 634.7032924701.

The spelling of 255689123 in words is "two hundred fifty-five million, six hundred eighty-nine thousand, one hundred twenty-three".