2209997 has 2 divisors, whose sum is σ = 2209998. Its totient is φ = 2209996.

The previous prime is 2209993. The next prime is 2210009. The reversal of 2209997 is 7999022.

2209997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1522756 + 687241 = 1234^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209997 - 2² = 2209993 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2209997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2209993) 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 as a sum of consecutive naturals, namely, 1104998 + 1104999.

It is an arithmetic number, because the mean of its divisors is an integer number (1104999).

2^2209997 is an apocalyptic number.

It is an amenable number.

2209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209997 is an equidigital number, since it uses as much as digits as its factorization.

2209997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 2209997 is about 1486.6058657223. The cubic root of 2209997 is about 130.2558472329.

The spelling of 2209997 in words is "two million, two hundred nine thousand, nine hundred ninety-seven".