2085989 has 2 divisors, whose sum is σ = 2085990. Its totient is φ = 2085988.

The previous prime is 2085983. The next prime is 2086003. The reversal of 2085989 is 9895802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 195364 = 1375^2 + 442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2085989 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 (2085983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1042994 + 1042995.

It is an arithmetic number, because the mean of its divisors is an integer number (1042995).

2^2085989 is an apocalyptic number.

It is an amenable number.

2085989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2085989 is an equidigital number, since it uses as much as digits as its factorization.

2085989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 2085989 is about 1444.2953299101. The cubic root of 2085989 is about 127.7724840207.

The spelling of 2085989 in words is "two million, eighty-five thousand, nine hundred eighty-nine".