87489 has 6 divisors (see below), whose sum is σ = 126386. Its totient is φ = 58320.

The previous prime is 87481. The next prime is 87491. The reversal of 87489 is 98478.

It can be written as a sum of positive squares in only one way, i.e., 50625 + 36864 = 225^2 + 192^2 .

It is not a de Polignac number, because 87489 - 2³ = 87481 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87489.

It is not an unprimeable number, because it can be changed into a prime (87481) 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, 4852 + ... + 4869.

2⁸⁷⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

87489 is a deficient number, since it is larger than the sum of its proper divisors (38897).

87489 is a wasteful number, since it uses less digits than its factorization.

87489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9727 (or 9724 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 87489 is about 295.7853951770. The cubic root of 87489 is about 44.3933396389.

It can be divided in two parts, 87 and 489, that added together give a square (576 = 24²).

The spelling of 87489 in words is "eighty-seven thousand, four hundred eighty-nine".