2199994 has 4 divisors (see below), whose sum is σ = 3299994. Its totient is φ = 1099996.

The previous prime is 2199979. The next prime is 2200013. The reversal of 2199994 is 4999912.

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

It can be written as a sum of positive squares in only one way, i.e., 1857769 + 342225 = 1363^2 + 585^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2199994.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549997 + ... + 550000.

2^2199994 is an apocalyptic number.

2199994 is a deficient number, since it is larger than the sum of its proper divisors (1100000).

2199994 is a wasteful number, since it uses less digits than its factorization.

2199994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099999.

The product of its digits is 52488, while the sum is 43.

The square root of 2199994 is about 1483.2376748182. The cubic root of 2199994 is about 130.0590264494.

The spelling of 2199994 in words is "two million, one hundred ninety-nine thousand, nine hundred ninety-four".