254987663 has 4 divisors (see below), whose sum is σ = 291414480. Its totient is φ = 218560848.

The previous prime is 254987659. The next prime is 254987671. The reversal of 254987663 is 366789452.

It is a happy number.

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 254987663 - 2² = 254987659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254987653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18213398 + ... + 18213411.

It is an arithmetic number, because the mean of its divisors is an integer number (72853620).

Almost surely, 2^254987663 is an apocalyptic number.

254987663 is a deficient number, since it is larger than the sum of its proper divisors (36426817).

254987663 is an equidigital number, since it uses as much as digits as its factorization.

254987663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36426816.

The product of its digits is 2177280, while the sum is 50.

The square root of 254987663 is about 15968.3331315451. Note that the first 3 decimals coincide. The cubic root of 254987663 is about 634.1223438461.

The spelling of 254987663 in words is "two hundred fifty-four million, nine hundred eighty-seven thousand, six hundred sixty-three".