4411947721 has 8 divisors (see below), whose sum is σ = 4532981544. Its totient is φ = 4291553280.

The previous prime is 4411947719. The next prime is 4411947779. The reversal of 4411947721 is 1277491144.

It can be written as a sum of positive squares in 4 ways, for example, as 616032400 + 3795915321 = 24820^2 + 61611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4411947721 - 2¹ = 4411947719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4411927721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145840 + ... + 173473.

It is an arithmetic number, because the mean of its divisors is an integer number (566622693).

Almost surely, 2^4411947721 is an apocalyptic number.

4411947721 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4411947721 is a deficient number, since it is larger than the sum of its proper divisors (121033823).

4411947721 is a wasteful number, since it uses less digits than its factorization.

4411947721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319691.

The product of its digits is 56448, while the sum is 40.

The square root of 4411947721 is about 66422.4940889756. The cubic root of 4411947721 is about 1640.1243858909.

The spelling of 4411947721 in words is "four billion, four hundred eleven million, nine hundred forty-seven thousand, seven hundred twenty-one".