8720432993 has 8 divisors (see below), whose sum is σ = 8744772960. Its totient is φ = 8696128000.

The previous prime is 8720432951. The next prime is 8720433017. The reversal of 8720432993 is 3992340278.

8720432993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8720432993 - 2⁸ = 8720432737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8720432923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536993 + ... + 552993.

It is an arithmetic number, because the mean of its divisors is an integer number (1093096620).

Almost surely, 2^8720432993 is an apocalyptic number.

It is an amenable number.

8720432993 is a deficient number, since it is larger than the sum of its proper divisors (24339967).

8720432993 is a wasteful number, since it uses less digits than its factorization.

8720432993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17487.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 8720432993 is about 93383.2586334403. The cubic root of 8720432993 is about 2058.3190007354.

The spelling of 8720432993 in words is "eight billion, seven hundred twenty million, four hundred thirty-two thousand, nine hundred ninety-three".