2199999 has 4 divisors (see below), whose sum is σ = 2933336. Its totient is φ = 1466664.

The previous prime is 2199979. The next prime is 2200013. The reversal of 2199999 is 9999912.

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

It is not a de Polignac number, because 2199999 - 2¹³ = 2191807 is a prime.

It is a D-number.

It is a Duffinian number.

2199999 is a modest number, since divided by 9999 gives 219 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199959) 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, 366664 + ... + 366669.

It is an arithmetic number, because the mean of its divisors is an integer number (733334).

2^2199999 is an apocalyptic number.

2199999 is a deficient number, since it is larger than the sum of its proper divisors (733337).

2199999 is an equidigital number, since it uses as much as digits as its factorization.

2199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733336.

The product of its digits is 118098, while the sum is 48.

The square root of 2199999 is about 1483.2393603192. The cubic root of 2199999 is about 130.0591249792.

The spelling of 2199999 in words is "two million, one hundred ninety-nine thousand, nine hundred ninety-nine".