255940999 has 4 divisors (see below), whose sum is σ = 258579664. Its totient is φ = 253302336.

The previous prime is 255940981. The next prime is 255941009. The reversal of 255940999 is 999049552.

255940999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 255940999 - 2¹⁷ = 255809927 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 (255940099) 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, 1319187 + ... + 1319380.

It is an arithmetic number, because the mean of its divisors is an integer number (64644916).

Almost surely, 2^255940999 is an apocalyptic number.

255940999 is a deficient number, since it is larger than the sum of its proper divisors (2638665).

255940999 is an equidigital number, since it uses as much as digits as its factorization.

255940999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638664.

The product of its (nonzero) digits is 1312200, while the sum is 52.

The square root of 255940999 is about 15998.1561125025. The cubic root of 255940999 is about 634.9116367010.

The spelling of 255940999 in words is "two hundred fifty-five million, nine hundred forty thousand, nine hundred ninety-nine".