1043989 has 4 divisors (see below), whose sum is σ = 1048140. Its totient is φ = 1039840.

The previous prime is 1043981. The next prime is 1044019. The reversal of 1043989 is 9893401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 321489 + 722500 = 567^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043989 - 2³ = 1043981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043981) 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 3 ways as a sum of consecutive naturals, for example, 1672 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (262035).

2^1043989 is an apocalyptic number.

It is an amenable number.

1043989 is a deficient number, since it is larger than the sum of its proper divisors (4151).

1043989 is an equidigital number, since it uses as much as digits as its factorization.

1043989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1043989 is about 1021.7577990894. The cubic root of 1043989 is about 101.4453101478.

The spelling of 1043989 in words is "one million, forty-three thousand, nine hundred eighty-nine".