9997867 has 12 divisors (see below), whose sum is σ = 11203920. Its totient is φ = 8911760.

The previous prime is 9997859. The next prime is 9997873. The reversal of 9997867 is 7687999.

It is not a de Polignac number, because 9997867 - 2³ = 9997859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9997817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5634 + ... + 7192.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^9997867 is an apocalyptic number.

9997867 is a deficient number, since it is larger than the sum of its proper divisors (1206053).

9997867 is a wasteful number, since it uses less digits than its factorization.

9997867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1623 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 55.

The square root of 9997867 is about 3161.9403852698. The cubic root of 9997867 is about 215.4281498833.

The spelling of 9997867 in words is "nine million, nine hundred ninety-seven thousand, eight hundred sixty-seven".