943989 has 8 divisors (see below), whose sum is σ = 1313472. Its totient is φ = 601920.

The previous prime is 943967. The next prime is 944003. The reversal of 943989 is 989349.

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

It is not a de Polignac number, because 943989 - 2⁹ = 943477 is a prime.

It is a super-2 number, since 2×943989² = 1782230464242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 943989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (943909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6772 + ... + 6909.

It is an arithmetic number, because the mean of its divisors is an integer number (164184).

2⁹⁴³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

943989 is a deficient number, since it is larger than the sum of its proper divisors (369483).

943989 is a wasteful number, since it uses less digits than its factorization.

943989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13707.

The product of its digits is 69984, while the sum is 42.

The square root of 943989 is about 971.5909633174. The cubic root of 943989 is about 98.0969816011.

The spelling of 943989 in words is "nine hundred forty-three thousand, nine hundred eighty-nine".