499886721 has 12 divisors (see below), whose sum is σ = 748801872. Its totient is φ = 333257652.

The previous prime is 499886657. The next prime is 499886743. The reversal of 499886721 is 127688994.

499886721 is a `hidden beast` number, since 499 + 8 + 86 + 72 + 1 = 666.

It is not a de Polignac number, because 499886721 - 2⁶ = 499886657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (499886771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1028331 + ... + 1028816.

It is an arithmetic number, because the mean of its divisors is an integer number (62400156).

Almost surely, 2^499886721 is an apocalyptic number.

It is an amenable number.

499886721 is a deficient number, since it is larger than the sum of its proper divisors (248915151).

499886721 is an equidigital number, since it uses as much as digits as its factorization.

499886721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057162 (or 2057150 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 499886721 is about 22358.1466360698. The cubic root of 499886721 is about 793.6405817223.

It can be divided in two parts, 4998 and 86721, that added together give a palindrome (91719).

The spelling of 499886721 in words is "four hundred ninety-nine million, eight hundred eighty-six thousand, seven hundred twenty-one".