12197489 has 2 divisors, whose sum is σ = 12197490. Its totient is φ = 12197488.

The previous prime is 12197443. The next prime is 12197491. The reversal of 12197489 is 98479121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7246864 + 4950625 = 2692^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 12197489 - 2⁸ = 12197233 is a prime.

Together with 12197491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12197089) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098744 + 6098745.

It is an arithmetic number, because the mean of its divisors is an integer number (6098745).

Almost surely, 2^12197489 is an apocalyptic number.

It is an amenable number.

12197489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197489 is an equidigital number, since it uses as much as digits as its factorization.

12197489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 12197489 is about 3492.4903722129. The cubic root of 12197489 is about 230.1919569513.

The spelling of 12197489 in words is "twelve million, one hundred ninety-seven thousand, four hundred eighty-nine".