13422989 has 8 divisors (see below), whose sum is σ = 13724568. Its totient is φ = 13124160.

The previous prime is 13422943. The next prime is 13423019. The reversal of 13422989 is 98922431.

13422989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 13213225 = 458^2 + 3635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13422989 - 2⁸ = 13422733 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 (13422089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11459 + ... + 12575.

It is an arithmetic number, because the mean of its divisors is an integer number (1715571).

Almost surely, 2^13422989 is an apocalyptic number.

It is an amenable number.

13422989 is a deficient number, since it is larger than the sum of its proper divisors (301579).

13422989 is a wasteful number, since it uses less digits than its factorization.

13422989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375.

The product of its digits is 31104, while the sum is 38.

The square root of 13422989 is about 3663.7397560416. The cubic root of 13422989 is about 237.6565261804.

The spelling of 13422989 in words is "thirteen million, four hundred twenty-two thousand, nine hundred eighty-nine".