13321989 has 24 divisors (see below), whose sum is σ = 20255872. Its totient is φ = 8748000.

The previous prime is 13321981. The next prime is 13321993. The reversal of 13321989 is 98912331.

It is not a de Polignac number, because 13321989 - 2³ = 13321981 is a prime.

It is a super-2 number, since 2×13321989² = 354950781832242, which contains 22 as substring.

It is a Duffinian 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 (13321981) 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 23 ways as a sum of consecutive naturals, for example, 17364 + ... + 18114.

Almost surely, 2^13321989 is an apocalyptic number.

It is an amenable number.

13321989 is a deficient number, since it is larger than the sum of its proper divisors (6933883).

13321989 is an frugal number, since it uses more digits than its factorization.

13321989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 827 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 13321989 is about 3649.9299993288. The cubic root of 13321989 is about 237.0589502453.

It can be divided in two parts, 1332 and 1989, that added together give a triangular number (3321 = T₈₁).

The spelling of 13321989 in words is "thirteen million, three hundred twenty-one thousand, nine hundred eighty-nine".