989169993 has 24 divisors (see below), whose sum is σ = 1703914368. Its totient is φ = 540663552.

The previous prime is 989169983. The next prime is 989170027. The reversal of 989169993 is 399961989.

It is not a de Polignac number, because 989169993 - 2¹⁸ = 988907849 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 989169993.

It is not an unprimeable number, because it can be changed into a prime (989169983) 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, 339880 + ... + 342777.

It is an arithmetic number, because the mean of its divisors is an integer number (70996432).

Almost surely, 2^989169993 is an apocalyptic number.

It is an amenable number.

989169993 is a deficient number, since it is larger than the sum of its proper divisors (714744375).

989169993 is a wasteful number, since it uses less digits than its factorization.

989169993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682693 (or 682690 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 63.

The square root of 989169993 is about 31451.0730023635. The cubic root of 989169993 is about 996.3768865692.

The spelling of 989169993 in words is "nine hundred eighty-nine million, one hundred sixty-nine thousand, nine hundred ninety-three".