1398197 has 2 divisors, whose sum is σ = 1398198. Its totient is φ = 1398196.

The previous prime is 1398161. The next prime is 1398209. The reversal of 1398197 is 7918931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1267876 + 130321 = 1126^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398197 - 2¹⁸ = 1136053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1398197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699098 + 699099.

It is an arithmetic number, because the mean of its divisors is an integer number (699099).

2^1398197 is an apocalyptic number.

It is an amenable number.

1398197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398197 is an equidigital number, since it uses as much as digits as its factorization.

1398197 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 1398197 is about 1182.4538045945. The cubic root of 1398197 is about 111.8208498593.

The spelling of 1398197 in words is "one million, three hundred ninety-eight thousand, one hundred ninety-seven".