1333989 has 20 divisors (see below), whose sum is σ = 2044416. Its totient is φ = 866376.

The previous prime is 1333967. The next prime is 1333991. The reversal of 1333989 is 9893331.

It is not a de Polignac number, because 1333989 - 2⁸ = 1333733 is a prime.

It is an Ulam 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 (1333909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3292 + ... + 3674.

2^1333989 is an apocalyptic number.

It is an amenable number.

1333989 is a deficient number, since it is larger than the sum of its proper divisors (710427).

1333989 is an equidigital number, since it uses as much as digits as its factorization.

1333989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 429 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 1333989 is about 1154.9844154793. The cubic root of 1333989 is about 110.0822800370.

Adding to 1333989 its sum of digits (36), we get a square (1334025 = 1155²).

The spelling of 1333989 in words is "one million, three hundred thirty-three thousand, nine hundred eighty-nine".