989393 has 8 divisors (see below), whose sum is σ = 1036200. Its totient is φ = 943488.

The previous prime is 989381. The next prime is 989411. The reversal of 989393 is 393989.

989393 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 4 ways, for example, as 23104 + 966289 = 152^2 + 983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989393 - 2⁴ = 989377 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 989393.

It is not an unprimeable number, because it can be changed into a prime (989323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005 + ... + 3317.

It is an arithmetic number, because the mean of its divisors is an integer number (129525).

2⁹⁸⁹³⁹³ is an apocalyptic number.

It is an amenable number.

989393 is a deficient number, since it is larger than the sum of its proper divisors (46807).

989393 is a wasteful number, since it uses less digits than its factorization.

989393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its digits is 52488, while the sum is 41.

The square root of 989393 is about 994.6823613596. The cubic root of 989393 is about 99.6451758204.

The spelling of 989393 in words is "nine hundred eighty-nine thousand, three hundred ninety-three".