254663999 has 4 divisors (see below), whose sum is σ = 255477936. Its totient is φ = 253850064.

The previous prime is 254663989. The next prime is 254664013. The reversal of 254663999 is 999366452.

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 254663999 - 2⁸ = 254663743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 254663999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254663939) 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, 406499 + ... + 407124.

It is an arithmetic number, because the mean of its divisors is an integer number (63869484).

Almost surely, 2^254663999 is an apocalyptic number.

254663999 is a deficient number, since it is larger than the sum of its proper divisors (813937).

254663999 is an equidigital number, since it uses as much as digits as its factorization.

254663999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813936.

The product of its digits is 3149280, while the sum is 53.

The square root of 254663999 is about 15958.1953553652. The cubic root of 254663999 is about 633.8539263163.

The spelling of 254663999 in words is "two hundred fifty-four million, six hundred sixty-three thousand, nine hundred ninety-nine".