993889 has 6 divisors (see below), whose sum is σ = 1076406. Its totient is φ = 917280.

The previous prime is 993887. The next prime is 993893. The reversal of 993889 is 988399.

993889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 33489 + 960400 = 183^2 + 980^2 .

It is not a de Polignac number, because 993889 - 2¹ = 993887 is a prime.

It is an Ulam number.

It is a Duffinian number.

993889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (993887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2772 + ... + 3109.

It is an arithmetic number, because the mean of its divisors is an integer number (179401).

2⁹⁹³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

993889 is a deficient number, since it is larger than the sum of its proper divisors (82517).

993889 is a wasteful number, since it uses less digits than its factorization.

993889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907 (or 5894 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 993889 is about 996.9398176420. The cubic root of 993889 is about 99.7958836486.

The spelling of 993889 in words is "nine hundred ninety-three thousand, eight hundred eighty-nine".