9723987 has 48 divisors (see below), whose sum is σ = 17891328. Its totient is φ = 4950720.

The previous prime is 9723979. The next prime is 9723997. The reversal of 9723987 is 7893279.

It is not a de Polignac number, because 9723987 - 2³ = 9723979 is a prime.

9723987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9723907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25198 + ... + 25580.

It is an arithmetic number, because the mean of its divisors is an integer number (372736).

Almost surely, 2^9723987 is an apocalyptic number.

9723987 is a deficient number, since it is larger than the sum of its proper divisors (8167341).

9723987 is a wasteful number, since it uses less digits than its factorization.

9723987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 437 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 9723987 is about 3118.3308034909. The cubic root of 9723987 is about 213.4427739794.

The spelling of 9723987 in words is "nine million, seven hundred twenty-three thousand, nine hundred eighty-seven".