2009198 has 4 divisors (see below), whose sum is σ = 3013800. Its totient is φ = 1004598.

The previous prime is 2009191. The next prime is 2009209. The reversal of 2009198 is 8919002.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502298 + ... + 502301.

It is an arithmetic number, because the mean of its divisors is an integer number (753450).

2^2009198 is an apocalyptic number.

2009198 is a deficient number, since it is larger than the sum of its proper divisors (1004602).

2009198 is a wasteful number, since it uses less digits than its factorization.

2009198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004601.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 2009198 is about 1417.4618160642. The cubic root of 2009198 is about 126.1849555480.

The spelling of 2009198 in words is "two million, nine thousand, one hundred ninety-eight".