2090989 has 2 divisors, whose sum is σ = 2090990. Its totient is φ = 2090988.

The previous prime is 2090951. The next prime is 2091053. The reversal of 2090989 is 9890902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1974025 + 116964 = 1405^2 + 342^2 .

It is a cyclic number.

It is not a de Polignac number, because 2090989 - 2⁹ = 2090477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2090089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045494 + 1045495.

It is an arithmetic number, because the mean of its divisors is an integer number (1045495).

2^2090989 is an apocalyptic number.

It is an amenable number.

2090989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2090989 is an equidigital number, since it uses as much as digits as its factorization.

2090989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 2090989 is about 1446.0252418267. The cubic root of 2090989 is about 127.8744904166.

The spelling of 2090989 in words is "two million, ninety thousand, nine hundred eighty-nine".