2199905 has 4 divisors (see below), whose sum is σ = 2639892. Its totient is φ = 1759920.

The previous prime is 2199893. The next prime is 2199907. The reversal of 2199905 is 5099912.

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 1151329 + 1048576 = 1073^2 + 1024^2 .

It is not a de Polignac number, because 2199905 - 2⁴ = 2199889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2199907) 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, 219986 + ... + 219995.

It is an arithmetic number, because the mean of its divisors is an integer number (659973).

2^2199905 is an apocalyptic number.

It is an amenable number.

2199905 is a deficient number, since it is larger than the sum of its proper divisors (439987).

2199905 is an equidigital number, since it uses as much as digits as its factorization.

2199905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439986.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 2199905 is about 1483.2076725799. The cubic root of 2199905 is about 130.0572725947.

The spelling of 2199905 in words is "two million, one hundred ninety-nine thousand, nine hundred five".