13981189 has 4 divisors (see below), whose sum is σ = 14000140. Its totient is φ = 13962240.

The previous prime is 13981147. The next prime is 13981193. The reversal of 13981189 is 98118931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10048900 + 3932289 = 3170^2 + 1983^2 .

It is a cyclic number.

It is not a de Polignac number, because 13981189 - 2⁹ = 13980677 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 (13981199) 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 3 ways as a sum of consecutive naturals, for example, 8322 + ... + 9859.

It is an arithmetic number, because the mean of its divisors is an integer number (3500035).

Almost surely, 2^13981189 is an apocalyptic number.

It is an amenable number.

13981189 is a deficient number, since it is larger than the sum of its proper divisors (18951).

13981189 is an equidigital number, since it uses as much as digits as its factorization.

13981189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18950.

The product of its digits is 15552, while the sum is 40.

The square root of 13981189 is about 3739.1428162080. The cubic root of 13981189 is about 240.9062323533.

The spelling of 13981189 in words is "thirteen million, nine hundred eighty-one thousand, one hundred eighty-nine".