1067989 has 4 divisors (see below), whose sum is σ = 1150156. Its totient is φ = 985824.

The previous prime is 1067987. The next prime is 1067999. The reversal of 1067989 is 9897601.

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 180625 + 887364 = 425^2 + 942^2 .

It is a cyclic number.

It is not a de Polignac number, because 1067989 - 2¹ = 1067987 is a prime.

It is a super-2 number, since 2×1067989² = 2281201008242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1067987) 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, 41064 + ... + 41089.

It is an arithmetic number, because the mean of its divisors is an integer number (287539).

2^1067989 is an apocalyptic number.

It is an amenable number.

1067989 is a deficient number, since it is larger than the sum of its proper divisors (82167).

1067989 is an equidigital number, since it uses as much as digits as its factorization.

1067989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82166.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1067989 is about 1033.4355325805. The cubic root of 1067989 is about 102.2167950717.

The spelling of 1067989 in words is "one million, sixty-seven thousand, nine hundred eighty-nine".