2087689 has 2 divisors, whose sum is σ = 2087690. Its totient is φ = 2087688.

The previous prime is 2087671. The next prime is 2087711. The reversal of 2087689 is 9867802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2016400 + 71289 = 1420^2 + 267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2087689 is a prime.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (2087669) 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, 1043844 + 1043845.

It is an arithmetic number, because the mean of its divisors is an integer number (1043845).

2^2087689 is an apocalyptic number.

It is an amenable number.

2087689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087689 is an equidigital number, since it uses as much as digits as its factorization.

2087689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 2087689 is about 1444.8837323467. The cubic root of 2087689 is about 127.8071844662.

The spelling of 2087689 in words is "two million, eighty-seven thousand, six hundred eighty-nine".