987967 has 4 divisors (see below), whose sum is σ = 993280. Its totient is φ = 982656.

The previous prime is 987941. The next prime is 987971. The reversal of 987967 is 769789.

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

It is a cyclic number.

It is not a de Polignac number, because 987967 - 2¹⁹ = 463679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2367 + ... + 2752.

It is an arithmetic number, because the mean of its divisors is an integer number (248320).

2⁹⁸⁷⁹⁶⁷ is an apocalyptic number.

987967 is a deficient number, since it is larger than the sum of its proper divisors (5313).

987967 is a wasteful number, since it uses less digits than its factorization.

987967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312.

The product of its digits is 190512, while the sum is 46.

The square root of 987967 is about 993.9652911445. The cubic root of 987967 is about 99.5972803459.

The spelling of 987967 in words is "nine hundred eighty-seven thousand, nine hundred sixty-seven".