987123 has 8 divisors (see below), whose sum is σ = 1351888. Its totient is φ = 640224.

The previous prime is 987101. The next prime is 987127. The reversal of 987123 is 321789.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 987123 - 2¹³ = 978931 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (987127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4336 + ... + 4557.

It is an arithmetic number, because the mean of its divisors is an integer number (168986).

2⁹⁸⁷¹²³ is an apocalyptic number.

987123 is a deficient number, since it is larger than the sum of its proper divisors (364765).

987123 is a wasteful number, since it uses less digits than its factorization.

987123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8933.

The product of its digits is 3024, while the sum is 30.

The square root of 987123 is about 993.5406383234. The cubic root of 987123 is about 99.5689109595.

The spelling of 987123 in words is "nine hundred eighty-seven thousand, one hundred twenty-three".