7584493921 has 9 divisors (see below), whose sum is σ = 7696265529. Its totient is φ = 7474326336.

The previous prime is 7584493913. The next prime is 7584493979. The reversal of 7584493921 is 1293944857.

The square root of 7584493921 is 87089.

It is a perfect power (a square), and thus also a powerful number.

7584493921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50253921 + 7534240000 = 7089^2 + 86800^2 .

It is not a de Polignac number, because 7584493921 - 2³ = 7584493913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7584493901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6356901 + ... + 6358093.

Almost surely, 2^7584493921 is an apocalyptic number.

7584493921 is the 87089-th square number.

7584493921 is the 43545-th centered octagonal number.

It is an amenable number.

7584493921 is a deficient number, since it is larger than the sum of its proper divisors (111771608).

7584493921 is an frugal number, since it uses more digits than its factorization.

7584493921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532 (or 1266 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The cubic root of 7584493921 is about 1964.7571106093.

The spelling of 7584493921 in words is "seven billion, five hundred eighty-four million, four hundred ninety-three thousand, nine hundred twenty-one".