987943923 has 24 divisors (see below), whose sum is σ = 1444035216. Its totient is φ = 650808000.

The previous prime is 987943907. The next prime is 987943927. The reversal of 987943923 is 329349789.

It is not a de Polignac number, because 987943923 - 2⁴ = 987943907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987943923.

It is not an unprimeable number, because it can be changed into a prime (987943927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 714693 + ... + 716073.

It is an arithmetic number, because the mean of its divisors is an integer number (60168134).

Almost surely, 2^987943923 is an apocalyptic number.

987943923 is a deficient number, since it is larger than the sum of its proper divisors (456091293).

987943923 is a wasteful number, since it uses less digits than its factorization.

987943923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275 (or 2272 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 987943923 is about 31431.5752548293. The cubic root of 987943923 is about 995.9650487324.

The spelling of 987943923 in words is "nine hundred eighty-seven million, nine hundred forty-three thousand, nine hundred twenty-three".