13994989 has 4 divisors (see below), whose sum is σ = 14006556. Its totient is φ = 13983424.

The previous prime is 13994987. The next prime is 13995013. The reversal of 13994989 is 98949931.

13994989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98949931 = 71 ⋅1393661.

It can be written as a sum of positive squares in 2 ways, for example, as 12482089 + 1512900 = 3533^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 13994989 - 2¹ = 13994987 is a prime.

It is a super-2 number, since 2×13994989² = 391719434220242, 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 (13994987) 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, 3724 + ... + 6469.

It is an arithmetic number, because the mean of its divisors is an integer number (3501639).

Almost surely, 2^13994989 is an apocalyptic number.

It is an amenable number.

13994989 is a deficient number, since it is larger than the sum of its proper divisors (11567).

13994989 is a wasteful number, since it uses less digits than its factorization.

13994989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566.

The product of its digits is 629856, while the sum is 52.

The square root of 13994989 is about 3740.9877038023. The cubic root of 13994989 is about 240.9854676935.

The spelling of 13994989 in words is "thirteen million, nine hundred ninety-four thousand, nine hundred eighty-nine".