7989728833 has 4 divisors (see below), whose sum is σ = 8459712900. Its totient is φ = 7519744768.

The previous prime is 7989728801. The next prime is 7989728843. The reversal of 7989728833 is 3388279897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3388279897 = 1861 ⋅1820677.

It can be written as a sum of positive squares in 2 ways, for example, as 2511212544 + 5478516289 = 50112^2 + 74017^2 .

It is a cyclic number.

It is not a de Polignac number, because 7989728833 - 2⁵ = 7989728801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7989728843) 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, 234992008 + ... + 234992041.

It is an arithmetic number, because the mean of its divisors is an integer number (2114928225).

Almost surely, 2^7989728833 is an apocalyptic number.

It is an amenable number.

7989728833 is a deficient number, since it is larger than the sum of its proper divisors (469984067).

7989728833 is a wasteful number, since it uses less digits than its factorization.

7989728833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469984066.

The product of its digits is 36578304, while the sum is 64.

The square root of 7989728833 is about 89385.2830895556. The cubic root of 7989728833 is about 1999.1437028466.

The spelling of 7989728833 in words is "seven billion, nine hundred eighty-nine million, seven hundred twenty-eight thousand, eight hundred thirty-three".