9447987 has 16 divisors (see below), whose sum is σ = 13220352. Its totient is φ = 5994720.

The previous prime is 9447983. The next prime is 9448001. The reversal of 9447987 is 7897449.

It is a happy number.

It is not a de Polignac number, because 9447987 - 2² = 9447983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9447983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4312 + ... + 6122.

It is an arithmetic number, because the mean of its divisors is an integer number (826272).

Almost surely, 2^9447987 is an apocalyptic number.

9447987 is a deficient number, since it is larger than the sum of its proper divisors (3772365).

9447987 is a wasteful number, since it uses less digits than its factorization.

9447987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898.

The product of its digits is 508032, while the sum is 48.

The square root of 9447987 is about 3073.7577978754. The cubic root of 9447987 is about 211.4039490310.

The spelling of 9447987 in words is "nine million, four hundred forty-seven thousand, nine hundred eighty-seven".