7473333721 has 4 divisors (see below), whose sum is σ = 8540952832. Its totient is φ = 6405714612.

The previous prime is 7473333709. The next prime is 7473333731. The reversal of 7473333721 is 1273333747.

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 7473333721 - 2⁵ = 7473333689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7473333731) 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, 533809545 + ... + 533809558.

It is an arithmetic number, because the mean of its divisors is an integer number (2135238208).

Almost surely, 2^7473333721 is an apocalyptic number.

It is an amenable number.

7473333721 is a deficient number, since it is larger than the sum of its proper divisors (1067619111).

7473333721 is a wasteful number, since it uses less digits than its factorization.

7473333721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067619110.

The product of its digits is 222264, while the sum is 40.

The square root of 7473333721 is about 86448.4454516101. The cubic root of 7473333721 is about 1955.1111778446. Note that the first 4 decimals are identical.

The spelling of 7473333721 in words is "seven billion, four hundred seventy-three million, three hundred thirty-three thousand, seven hundred twenty-one".