12198397 has 2 divisors, whose sum is σ = 12198398. Its totient is φ = 12198396.

The previous prime is 12198391. The next prime is 12198413. The reversal of 12198397 is 79389121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10310521 + 1887876 = 3211^2 + 1374^2 .

It is a cyclic number.

It is not a de Polignac number, because 12198397 - 2⁷ = 12198269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12198391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6099198 + 6099199.

It is an arithmetic number, because the mean of its divisors is an integer number (6099199).

Almost surely, 2^12198397 is an apocalyptic number.

It is an amenable number.

12198397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12198397 is an equidigital number, since it uses as much as digits as its factorization.

12198397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 12198397 is about 3492.6203629940. The cubic root of 12198397 is about 230.1976687583.

The spelling of 12198397 in words is "twelve million, one hundred ninety-eight thousand, three hundred ninety-seven".