12166997 has 2 divisors, whose sum is σ = 12166998. Its totient is φ = 12166996.

The previous prime is 12166991. The next prime is 12167009. The reversal of 12166997 is 79966121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9205156 + 2961841 = 3034^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 12166997 - 2⁶ = 12166933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12166991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6083498 + 6083499.

It is an arithmetic number, because the mean of its divisors is an integer number (6083499).

Almost surely, 2^12166997 is an apocalyptic number.

It is an amenable number.

12166997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12166997 is an equidigital number, since it uses as much as digits as its factorization.

12166997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 12166997 is about 3488.1222742329. The cubic root of 12166997 is about 229.9999810964. Note that the first 4 decimals are identical.

The spelling of 12166997 in words is "twelve million, one hundred sixty-six thousand, nine hundred ninety-seven".