13197889 has 4 divisors (see below), whose sum is σ = 13378756. Its totient is φ = 13017024.

The previous prime is 13197881. The next prime is 13197923. The reversal of 13197889 is 98879131.

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 5313025 + 7884864 = 2305^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 13197889 - 2³ = 13197881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13197881) 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, 90324 + ... + 90469.

It is an arithmetic number, because the mean of its divisors is an integer number (3344689).

Almost surely, 2^13197889 is an apocalyptic number.

It is an amenable number.

13197889 is a deficient number, since it is larger than the sum of its proper divisors (180867).

13197889 is an equidigital number, since it uses as much as digits as its factorization.

13197889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180866.

The product of its digits is 108864, while the sum is 46.

The square root of 13197889 is about 3632.8898964874. The cubic root of 13197889 is about 236.3205509552.

The spelling of 13197889 in words is "thirteen million, one hundred ninety-seven thousand, eight hundred eighty-nine".