504749891 has 4 divisors (see below), whose sum is σ = 504795984. Its totient is φ = 504703800.

The previous prime is 504749851. The next prime is 504749909. The reversal of 504749891 is 198947405.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 504749891 - 2⁶ = 504749827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504749821) 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, 3821 + ... + 32001.

It is an arithmetic number, because the mean of its divisors is an integer number (126198996).

Almost surely, 2^504749891 is an apocalyptic number.

504749891 is a deficient number, since it is larger than the sum of its proper divisors (46093).

504749891 is a wasteful number, since it uses less digits than its factorization.

504749891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46092.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 504749891 is about 22466.6395128421. The cubic root of 504749891 is about 796.2059363593.

The spelling of 504749891 in words is "five hundred four million, seven hundred forty-nine thousand, eight hundred ninety-one".