2198197 has 4 divisors (see below), whose sum is σ = 2213100. Its totient is φ = 2183296.

The previous prime is 2198191. The next prime is 2198201. The reversal of 2198197 is 7918912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 1572516 = 791^2 + 1254^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198197 - 2¹¹ = 2196149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7228 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (553275).

2^2198197 is an apocalyptic number.

2198197 is the 793-rd centered heptagonal number.

It is an amenable number.

2198197 is a deficient number, since it is larger than the sum of its proper divisors (14903).

2198197 is a wasteful number, since it uses less digits than its factorization.

2198197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14902.

The product of its digits is 9072, while the sum is 37.

The square root of 2198197 is about 1482.6317816639. The cubic root of 2198197 is about 130.0236051810.

The spelling of 2198197 in words is "two million, one hundred ninety-eight thousand, one hundred ninety-seven".