987673 has 4 divisors (see below), whose sum is σ = 990388. Its totient is φ = 984960.

The previous prime is 987659. The next prime is 987697. The reversal of 987673 is 376789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 659344 = 573^2 + 812^2 .

It is a cyclic number.

It is not a de Polignac number, because 987673 - 2¹³ = 979481 is a prime.

It is a Duffinian number.

987673 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (987473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (247597).

2⁹⁸⁷⁶⁷³ is an apocalyptic number.

It is an amenable number.

987673 is a deficient number, since it is larger than the sum of its proper divisors (2715).

987673 is a wasteful number, since it uses less digits than its factorization.

987673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714.

The product of its digits is 63504, while the sum is 40.

The square root of 987673 is about 993.8173876523. The cubic root of 987673 is about 99.5873999534.

The spelling of 987673 in words is "nine hundred eighty-seven thousand, six hundred seventy-three".