2199947 has 4 divisors (see below), whose sum is σ = 2220240. Its totient is φ = 2179656.

The previous prime is 2199941. The next prime is 2199959. The reversal of 2199947 is 7499912.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2199947 - 2⁴ = 2199931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2199941) 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, 9983 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (555060).

2^2199947 is an apocalyptic number.

2199947 is a deficient number, since it is larger than the sum of its proper divisors (20293).

2199947 is a wasteful number, since it uses less digits than its factorization.

2199947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20292.

The product of its digits is 40824, while the sum is 41.

The square root of 2199947 is about 1483.2218310152. The cubic root of 2199947 is about 130.0581002624.

The spelling of 2199947 in words is "two million, one hundred ninety-nine thousand, nine hundred forty-seven".