987843 has 4 divisors (see below), whose sum is σ = 1317128. Its totient is φ = 658560.

The previous prime is 987821. The next prime is 987851. The reversal of 987843 is 348789.

987843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 987843 - 2⁸ = 987587 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987803) 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, 164638 + ... + 164643.

It is an arithmetic number, because the mean of its divisors is an integer number (329282).

2⁹⁸⁷⁸⁴³ is an apocalyptic number.

987843 is a deficient number, since it is larger than the sum of its proper divisors (329285).

987843 is a wasteful number, since it uses less digits than its factorization.

987843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329284.

The product of its digits is 48384, while the sum is 39.

The square root of 987843 is about 993.9029127636. The cubic root of 987843 is about 99.5931133446.

It can be divided in two parts, 987 and 843, that added together give a triangular number (1830 = T₆₀).

The spelling of 987843 in words is "nine hundred eighty-seven thousand, eight hundred forty-three".