12197947 has 2 divisors, whose sum is σ = 12197948. Its totient is φ = 12197946.

The previous prime is 12197921. The next prime is 12197963. The reversal of 12197947 is 74979121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12197947 - 2²³ = 3809339 is a prime.

It is a super-2 number, since 2×12197947² = 297579822029618, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12197917) 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 as a sum of consecutive naturals, namely, 6098973 + 6098974.

It is an arithmetic number, because the mean of its divisors is an integer number (6098974).

Almost surely, 2^12197947 is an apocalyptic number.

12197947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197947 is an equidigital number, since it uses as much as digits as its factorization.

12197947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 12197947 is about 3492.5559408548. Note that the first 3 decimals coincide. The cubic root of 12197947 is about 230.1948380524.

The spelling of 12197947 in words is "twelve million, one hundred ninety-seven thousand, nine hundred forty-seven".