2205989 has 2 divisors, whose sum is σ = 2205990. Its totient is φ = 2205988.

The previous prime is 2205949. The next prime is 2206021. The reversal of 2205989 is 9895022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 917764 = 1135^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205989 - 2²⁰ = 1157413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2205949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102994 + 1102995.

It is an arithmetic number, because the mean of its divisors is an integer number (1102995).

2^2205989 is an apocalyptic number.

It is an amenable number.

2205989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205989 is an equidigital number, since it uses as much as digits as its factorization.

2205989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 2205989 is about 1485.2572167810. The cubic root of 2205989 is about 130.1770565745.

The spelling of 2205989 in words is "two million, two hundred five thousand, nine hundred eighty-nine".