255698869 has 8 divisors (see below), whose sum is σ = 258877080. Its totient is φ = 252527616.

The previous prime is 255698813. The next prime is 255698893. The reversal of 255698869 is 968896552.

It can be written as a sum of positive squares in 4 ways, for example, as 50836900 + 204861969 = 7130^2 + 14313^2 .

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 255698869 - 2⁹ = 255698357 is a prime.

It is a super-2 number, since 2×255698869² = 130763823215758322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255698899) 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, 149829 + ... + 151525.

It is an arithmetic number, because the mean of its divisors is an integer number (32359635).

Almost surely, 2^255698869 is an apocalyptic number.

It is an amenable number.

255698869 is a deficient number, since it is larger than the sum of its proper divisors (3178211).

255698869 is a wasteful number, since it uses less digits than its factorization.

255698869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479.

The product of its digits is 9331200, while the sum is 58.

The square root of 255698869 is about 15990.5868872909. The cubic root of 255698869 is about 634.7113566115.

The spelling of 255698869 in words is "two hundred fifty-five million, six hundred ninety-eight thousand, eight hundred sixty-nine".