13197845 has 4 divisors (see below), whose sum is σ = 15837420. Its totient is φ = 10558272.

The previous prime is 13197841. The next prime is 13197851. The reversal of 13197845 is 54879131.

13197845 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5750404 + 7447441 = 2398^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 13197845 - 2² = 13197841 is a prime.

It is a super-4 number, since 4×13197845⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 13197799 and 13197808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13197841) 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, 1319780 + ... + 1319789.

It is an arithmetic number, because the mean of its divisors is an integer number (3959355).

Almost surely, 2^13197845 is an apocalyptic number.

It is an amenable number.

13197845 is a deficient number, since it is larger than the sum of its proper divisors (2639575).

13197845 is an equidigital number, since it uses as much as digits as its factorization.

13197845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639574.

The product of its digits is 30240, while the sum is 38.

The square root of 13197845 is about 3632.8838406974. The cubic root of 13197845 is about 236.3202883345.

The spelling of 13197845 in words is "thirteen million, one hundred ninety-seven thousand, eight hundred forty-five".