889566993 has 24 divisors (see below), whose sum is σ = 1471711488. Its totient is φ = 507209472.

The previous prime is 889566991. The next prime is 889567043. The reversal of 889566993 is 399665988.

It is not a de Polignac number, because 889566993 - 2¹ = 889566991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 889566993.

It is not an unprimeable number, because it can be changed into a prime (889566991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13921 + ... + 44417.

It is an arithmetic number, because the mean of its divisors is an integer number (61321312).

Almost surely, 2^889566993 is an apocalyptic number.

It is an amenable number.

889566993 is a deficient number, since it is larger than the sum of its proper divisors (582144495).

889566993 is a wasteful number, since it uses less digits than its factorization.

889566993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30973 (or 30970 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The square root of 889566993 is about 29825.6096836259. The cubic root of 889566993 is about 961.7441502320.

The spelling of 889566993 in words is "eight hundred eighty-nine million, five hundred sixty-six thousand, nine hundred ninety-three".