9893993989 has 16 divisors (see below), whose sum is σ = 10876212864. Its totient is φ = 8925696000.

The previous prime is 9893993981. The next prime is 9893994029.

It is a happy number.

9893993989 is nontrivially palindromic in base 10.

9893993989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9893993989 - 2³ = 9893993981 is a prime.

It is a super-2 number, since 2×9893993989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9893993981) 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 15 ways as a sum of consecutive naturals, for example, 1979077 + ... + 1984069.

It is an arithmetic number, because the mean of its divisors is an integer number (679763304).

Almost surely, 2^9893993989 is an apocalyptic number.

It is an amenable number.

9893993989 is a deficient number, since it is larger than the sum of its proper divisors (982218875).

9893993989 is a wasteful number, since it uses less digits than its factorization.

9893993989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348.

The product of its digits is 306110016, while the sum is 76.

The square root of 9893993989 is about 99468.5577908919. The cubic root of 9893993989 is about 2146.7948629311.

The spelling of 9893993989 in words is "nine billion, eight hundred ninety-three million, nine hundred ninety-three thousand, nine hundred eighty-nine".