255317789 has 8 divisors (see below), whose sum is σ = 262191072. Its totient is φ = 248487120.

The previous prime is 255317761. The next prime is 255317791. The reversal of 255317789 is 987713552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255317789 - 2¹² = 255313693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255317749) 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 in 7 ways as a sum of consecutive naturals, for example, 1679 + ... + 22659.

It is an arithmetic number, because the mean of its divisors is an integer number (32773884).

Almost surely, 2^255317789 is an apocalyptic number.

It is an amenable number.

255317789 is a deficient number, since it is larger than the sum of its proper divisors (6873283).

255317789 is a wasteful number, since it uses less digits than its factorization.

255317789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21307.

The product of its digits is 529200, while the sum is 47.

The square root of 255317789 is about 15978.6666840510. Note that the first 4 decimals coincide. The cubic root of 255317789 is about 634.3958864858.

The spelling of 255317789 in words is "two hundred fifty-five million, three hundred seventeen thousand, seven hundred eighty-nine".