887989 has 2 divisors, whose sum is σ = 887990. Its totient is φ = 887988.

The previous prime is 887987. The next prime is 888001. The reversal of 887989 is 989788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887364 + 625 = 942^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 887989 - 2¹ = 887987 is a prime.

Together with 887987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (887987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443994 + 443995.

It is an arithmetic number, because the mean of its divisors is an integer number (443995).

2⁸⁸⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

887989 is a deficient number, since it is larger than the sum of its proper divisors (1).

887989 is an equidigital number, since it uses as much as digits as its factorization.

887989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 49.

The square root of 887989 is about 942.3316825832. The cubic root of 887989 is about 96.1175137892.

The spelling of 887989 in words is "eight hundred eighty-seven thousand, nine hundred eighty-nine".