255749973 has 4 divisors (see below), whose sum is σ = 340999968. Its totient is φ = 170499980.

The previous prime is 255749971. The next prime is 255749981. The reversal of 255749973 is 379947552.

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 255749973 - 2¹ = 255749971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255749971) 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 3 ways as a sum of consecutive naturals, for example, 42624993 + ... + 42624998.

It is an arithmetic number, because the mean of its divisors is an integer number (85249992).

Almost surely, 2^255749973 is an apocalyptic number.

It is an amenable number.

255749973 is a deficient number, since it is larger than the sum of its proper divisors (85249995).

255749973 is an equidigital number, since it uses as much as digits as its factorization.

255749973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85249994.

The product of its digits is 2381400, while the sum is 51.

The square root of 255749973 is about 15992.1847475572. The cubic root of 255749973 is about 634.7536382852.

The spelling of 255749973 in words is "two hundred fifty-five million, seven hundred forty-nine thousand, nine hundred seventy-three".