4493399721 has 16 divisors (see below), whose sum is σ = 6011769600. Its totient is φ = 2985333120.

The previous prime is 4493399711. The next prime is 4493399777. The reversal of 4493399721 is 1279933944.

It is not a de Polignac number, because 4493399721 - 2⁷ = 4493399593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4493399711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1472205 + ... + 1475253.

It is an arithmetic number, because the mean of its divisors is an integer number (375735600).

Almost surely, 2^4493399721 is an apocalyptic number.

It is an amenable number.

4493399721 is a deficient number, since it is larger than the sum of its proper divisors (1518369879).

4493399721 is a wasteful number, since it uses less digits than its factorization.

4493399721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576.

The product of its digits is 1469664, while the sum is 51.

The square root of 4493399721 is about 67032.8256975640. The cubic root of 4493399721 is about 1650.1560575995.

The spelling of 4493399721 in words is "four billion, four hundred ninety-three million, three hundred ninety-nine thousand, seven hundred twenty-one".