1989369 has 12 divisors (see below), whose sum is σ = 2935296. Its totient is φ = 1297752.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989369 is 9639891.

It is not a de Polignac number, because 1989369 - 2⁴ = 1989353 is a prime.

It is a super-2 number, since 2×1989369² = 7915178036322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1989329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1929 + ... + 2774.

It is an arithmetic number, because the mean of its divisors is an integer number (244608).

2^1989369 is an apocalyptic number.

It is an amenable number.

1989369 is a deficient number, since it is larger than the sum of its proper divisors (945927).

1989369 is a wasteful number, since it uses less digits than its factorization.

1989369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756 (or 4753 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 1989369 is about 1410.4499282144. The cubic root of 1989369 is about 125.7684712671.

The spelling of 1989369 in words is "one million, nine hundred eighty-nine thousand, three hundred sixty-nine".