2209947 has 16 divisors (see below), whose sum is σ = 3135360. Its totient is φ = 1380672.

The previous prime is 2209939. The next prime is 2209957. The reversal of 2209947 is 7499022.

2209947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2209947 - 2³ = 2209939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2209937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7668 + ... + 7950.

It is an arithmetic number, because the mean of its divisors is an integer number (195960).

2^2209947 is an apocalyptic number.

2209947 is a deficient number, since it is larger than the sum of its proper divisors (925413).

2209947 is a wasteful number, since it uses less digits than its factorization.

2209947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 2209947 is about 1486.5890487959. The cubic root of 2209947 is about 130.2548649025.

The spelling of 2209947 in words is "two million, two hundred nine thousand, nine hundred forty-seven".