987923 has 4 divisors (see below), whose sum is σ = 990528. Its totient is φ = 985320.

The previous prime is 987913. The next prime is 987929. The reversal of 987923 is 329789.

987923 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987929) 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, 611 + ... + 1532.

It is an arithmetic number, because the mean of its divisors is an integer number (247632).

2⁹⁸⁷⁹²³ is an apocalyptic number.

987923 is a deficient number, since it is larger than the sum of its proper divisors (2605).

987923 is a wasteful number, since it uses less digits than its factorization.

987923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604.

The product of its digits is 27216, while the sum is 38.

The square root of 987923 is about 993.9431573284. The cubic root of 987923 is about 99.5958017725.

The spelling of 987923 in words is "nine hundred eighty-seven thousand, nine hundred twenty-three".