987489 has 6 divisors (see below), whose sum is σ = 1426386. Its totient is φ = 658320.

The previous prime is 987473. The next prime is 987491. The reversal of 987489 is 984789.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 36864 = 975^2 + 192^2 .

It is not a de Polignac number, because 987489 - 2⁴ = 987473 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (987089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54852 + ... + 54869.

It is an arithmetic number, because the mean of its divisors is an integer number (237731).

2⁹⁸⁷⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

987489 is a deficient number, since it is larger than the sum of its proper divisors (438897).

987489 is a wasteful number, since it uses less digits than its factorization.

987489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109727 (or 109724 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 987489 is about 993.7248110015. The cubic root of 987489 is about 99.5812153087.

The spelling of 987489 in words is "nine hundred eighty-seven thousand, four hundred eighty-nine".