12194387 has 2 divisors, whose sum is σ = 12194388. Its totient is φ = 12194386.

The previous prime is 12194383. The next prime is 12194407. The reversal of 12194387 is 78349121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12194387 - 2² = 12194383 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12194383) 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, 6097193 + 6097194.

It is an arithmetic number, because the mean of its divisors is an integer number (6097194).

Almost surely, 2^12194387 is an apocalyptic number.

12194387 is a deficient number, since it is larger than the sum of its proper divisors (1).

12194387 is an equidigital number, since it uses as much as digits as its factorization.

12194387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 12194387 is about 3492.0462482619. The cubic root of 12194387 is about 230.1724415688.

The spelling of 12194387 in words is "twelve million, one hundred ninety-four thousand, three hundred eighty-seven".