987089 has 2 divisors, whose sum is σ = 987090. Its totient is φ = 987088.

The previous prime is 987083. The next prime is 987097. The reversal of 987089 is 980789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984064 + 3025 = 992^2 + 55^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987089 is a prime.

It is a super-3 number, since 3×987089³ = 2885294788733357907, which contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (987083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493544 + 493545.

It is an arithmetic number, because the mean of its divisors is an integer number (493545).

2⁹⁸⁷⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

987089 is a deficient number, since it is larger than the sum of its proper divisors (1).

987089 is an equidigital number, since it uses as much as digits as its factorization.

987089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 987089 is about 993.5235276530. The cubic root of 987089 is about 99.5677677781.

The spelling of 987089 in words is "nine hundred eighty-seven thousand, eighty-nine".