989693 has 4 divisors (see below), whose sum is σ = 993888. Its totient is φ = 985500.

The previous prime is 989687. The next prime is 989719. The reversal of 989693 is 396989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 396989 = 83 ⋅4783.

It is a cyclic number.

It is not a de Polignac number, because 989693 - 2⁶ = 989629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (248472).

2⁹⁸⁹⁶⁹³ is an apocalyptic number.

It is an amenable number.

989693 is a deficient number, since it is larger than the sum of its proper divisors (4195).

989693 is a wasteful number, since it uses less digits than its factorization.

989693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194.

The product of its digits is 104976, while the sum is 44.

The square root of 989693 is about 994.8331518400. The cubic root of 989693 is about 99.6552461470.

Subtracting from 989693 its reverse (396989), we obtain a cube (592704 = 84³).

The spelling of 989693 in words is "nine hundred eighty-nine thousand, six hundred ninety-three".