2197849 has 2 divisors, whose sum is σ = 2197850. Its totient is φ = 2197848.

The previous prime is 2197847. The next prime is 2197873. The reversal of 2197849 is 9487912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082249 + 115600 = 1443^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197849 - 2¹ = 2197847 is a prime.

Together with 2197847, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2197847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098924 + 1098925.

It is an arithmetic number, because the mean of its divisors is an integer number (1098925).

2^2197849 is an apocalyptic number.

It is an amenable number.

2197849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197849 is an equidigital number, since it uses as much as digits as its factorization.

2197849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 2197849 is about 1482.5144181424. The cubic root of 2197849 is about 130.0167434056.

The spelling of 2197849 in words is "two million, one hundred ninety-seven thousand, eight hundred forty-nine".