13198897 has 4 divisors (see below), whose sum is σ = 13241380. Its totient is φ = 13156416.

The previous prime is 13198883. The next prime is 13198903. The reversal of 13198897 is 79889131.

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 6355441 + 6843456 = 2521^2 + 2616^2 .

It is a cyclic number.

It is not a de Polignac number, because 13198897 - 2⁷ = 13198769 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13198877) 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, 20772 + ... + 21397.

It is an arithmetic number, because the mean of its divisors is an integer number (3310345).

Almost surely, 2^13198897 is an apocalyptic number.

It is an amenable number.

13198897 is a deficient number, since it is larger than the sum of its proper divisors (42483).

13198897 is an equidigital number, since it uses as much as digits as its factorization.

13198897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42482.

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

The square root of 13198897 is about 3633.0286263667. The cubic root of 13198897 is about 236.3265671964.

The spelling of 13198897 in words is "thirteen million, one hundred ninety-eight thousand, eight hundred ninety-seven".