4809528721 has 4 divisors (see below), whose sum is σ = 4810763632. Its totient is φ = 4808293812.

The previous prime is 4809528671. The next prime is 4809528727. The reversal of 4809528721 is 1278259084.

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 4809528721 - 2¹⁵ = 4809495953 is a prime.

It is a super-3 number, since 3×4809528721³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4809528727) 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, 611595 + ... + 619408.

It is an arithmetic number, because the mean of its divisors is an integer number (1202690908).

Almost surely, 2^4809528721 is an apocalyptic number.

It is an amenable number.

4809528721 is a deficient number, since it is larger than the sum of its proper divisors (1234911).

4809528721 is a wasteful number, since it uses less digits than its factorization.

4809528721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234910.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 4809528721 is about 69350.7658285040. The cubic root of 4809528721 is about 1687.9808198117.

The spelling of 4809528721 in words is "four billion, eight hundred nine million, five hundred twenty-eight thousand, seven hundred twenty-one".