12197197 has 4 divisors (see below), whose sum is σ = 12617820. Its totient is φ = 11776576.

The previous prime is 12197191. The next prime is 12197219. The reversal of 12197197 is 79179121.

12197197 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 4901796 + 7295401 = 2214^2 + 2701^2 .

It is a cyclic number.

It is not a de Polignac number, because 12197197 - 2³ = 12197189 is a prime.

It is a super-2 number, since 2×12197197² = 297543229313618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12197191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210268 + ... + 210325.

It is an arithmetic number, because the mean of its divisors is an integer number (3154455).

Almost surely, 2^12197197 is an apocalyptic number.

It is an amenable number.

12197197 is a deficient number, since it is larger than the sum of its proper divisors (420623).

12197197 is an equidigital number, since it uses as much as digits as its factorization.

12197197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420622.

The product of its digits is 7938, while the sum is 37.

The square root of 12197197 is about 3492.4485679821. The cubic root of 12197197 is about 230.1901200544.

The spelling of 12197197 in words is "twelve million, one hundred ninety-seven thousand, one hundred ninety-seven".