4328472721 has 4 divisors (see below), whose sum is σ = 4370496832. Its totient is φ = 4286448612.

The previous prime is 4328472679. The next prime is 4328472727. The reversal of 4328472721 is 1272748234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4328472721 - 2²¹ = 4326375569 is a prime.

It is a super-2 number, since 2×4328472721² = 37471352192882287682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4328472727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21011901 + ... + 21012106.

It is an arithmetic number, because the mean of its divisors is an integer number (1092624208).

Almost surely, 2^4328472721 is an apocalyptic number.

It is an amenable number.

4328472721 is a deficient number, since it is larger than the sum of its proper divisors (42024111).

4328472721 is a wasteful number, since it uses less digits than its factorization.

4328472721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42024110.

The product of its digits is 150528, while the sum is 40.

The square root of 4328472721 is about 65791.1295008681. The cubic root of 4328472721 is about 1629.7146201430.

The spelling of 4328472721 in words is "four billion, three hundred twenty-eight million, four hundred seventy-two thousand, seven hundred twenty-one".