13198689 has 27 divisors (see below), whose sum is σ = 22306323. Its totient is φ = 7498512.

The previous prime is 13198667. The next prime is 13198697. The reversal of 13198689 is 98689131.

The square root of 13198689 is 3633.

It is a perfect power (a square), and thus also a powerful number.

13198689 is digitally balanced in base 3, 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 only one way, i.e., 12006225 + 1192464 = 3465^2 + 1092^2 .

It is not a de Polignac number, because 13198689 - 2¹⁵ = 13165921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13198699) 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 26 ways as a sum of consecutive naturals, for example, 76207 + ... + 76379.

Almost surely, 2^13198689 is an apocalyptic number.

13198689 is the 3633-rd square number.

13198689 is the 1817-th centered octagonal number.

It is an amenable number.

13198689 is a deficient number, since it is larger than the sum of its proper divisors (9107634).

13198689 is an equidigital number, since it uses as much as digits as its factorization.

13198689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 183 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The cubic root of 13198689 is about 236.3253257749.

The spelling of 13198689 in words is "thirteen million, one hundred ninety-eight thousand, six hundred eighty-nine".