255394869 has 4 divisors (see below), whose sum is σ = 340526496. Its totient is φ = 170263244.

The previous prime is 255394837. The next prime is 255394871. The reversal of 255394869 is 968493552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255394869 - 2⁵ = 255394837 is a prime.

It is a super-2 number, since 2×255394869² = 130453078223054322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255394169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42565809 + ... + 42565814.

It is an arithmetic number, because the mean of its divisors is an integer number (85131624).

Almost surely, 2^255394869 is an apocalyptic number.

It is an amenable number.

255394869 is a deficient number, since it is larger than the sum of its proper divisors (85131627).

255394869 is an equidigital number, since it uses as much as digits as its factorization.

255394869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85131626.

The product of its digits is 2332800, while the sum is 51.

The square root of 255394869 is about 15981.0784679883. The cubic root of 255394869 is about 634.4597210703.

The spelling of 255394869 in words is "two hundred fifty-five million, three hundred ninety-four thousand, eight hundred sixty-nine".