8989918393 has 16 divisors (see below), whose sum is σ = 9688909824. Its totient is φ = 8311161600.

The previous prime is 8989918363. The next prime is 8989918411. The reversal of 8989918393 is 3938199898.

It is a cyclic number.

It is not a de Polignac number, because 8989918393 - 2¹⁷ = 8989787321 is a prime.

It is a super-3 number, since 3×8989918393³ (a number of 31 digits) contains 333 as substring.

Its product of digits (30233088) is a multiple of the sum of its prime divisors (41472).

It is not an unprimeable number, because it can be changed into a prime (8989918313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197446 + ... + 238672.

It is an arithmetic number, because the mean of its divisors is an integer number (605556864).

Almost surely, 2^8989918393 is an apocalyptic number.

It is an amenable number.

8989918393 is a deficient number, since it is larger than the sum of its proper divisors (698991431).

8989918393 is a wasteful number, since it uses less digits than its factorization.

8989918393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41472.

The product of its digits is 30233088, while the sum is 67.

The square root of 8989918393 is about 94815.1801822894. The cubic root of 8989918393 is about 2079.3068444306.

The spelling of 8989918393 in words is "eight billion, nine hundred eighty-nine million, nine hundred eighteen thousand, three hundred ninety-three".