1198397 has 2 divisors, whose sum is σ = 1198398. Its totient is φ = 1198396.

The previous prime is 1198363. The next prime is 1198399. The reversal of 1198397 is 7938911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872356 + 326041 = 934^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198397 - 2¹⁶ = 1132861 is a prime.

Together with 1198399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1198397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599198 + 599199.

It is an arithmetic number, because the mean of its divisors is an integer number (599199).

2^1198397 is an apocalyptic number.

It is an amenable number.

1198397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198397 is an equidigital number, since it uses as much as digits as its factorization.

1198397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 1198397 is about 1094.7132044513. The cubic root of 1198397 is about 106.2185180084.

The spelling of 1198397 in words is "one million, one hundred ninety-eight thousand, three hundred ninety-seven".