198246397 has 2 divisors, whose sum is σ = 198246398. Its totient is φ = 198246396.

The previous prime is 198246379. The next prime is 198246403. The reversal of 198246397 is 793642891.

Together with previous prime (198246379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198077476 + 168921 = 14074^2 + 411^2 .

It is an emirp because it is prime and its reverse (793642891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198246397 - 2²⁷ = 64028669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198246397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198240397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99123198 + 99123199.

It is an arithmetic number, because the mean of its divisors is an integer number (99123199).

Almost surely, 2^198246397 is an apocalyptic number.

It is an amenable number.

198246397 is a deficient number, since it is larger than the sum of its proper divisors (1).

198246397 is an equidigital number, since it uses as much as digits as its factorization.

198246397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 198246397 is about 14079.9998934659. Note that the first 3 decimals coincide. The cubic root of 198246397 is about 583.0893390094.

The spelling of 198246397 in words is "one hundred ninety-eight million, two hundred forty-six thousand, three hundred ninety-seven".