9906865 has 8 divisors (see below), whose sum is σ = 11905920. Its totient is φ = 7913712.

The previous prime is 9906863. The next prime is 9906877. The reversal of 9906865 is 5686099.

9906865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9906865 - 2¹ = 9906863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9906863) 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, 4242 + ... + 6148.

It is an arithmetic number, because the mean of its divisors is an integer number (1488240).

Almost surely, 2^9906865 is an apocalyptic number.

It is an amenable number.

9906865 is a deficient number, since it is larger than the sum of its proper divisors (1999055).

9906865 is a wasteful number, since it uses less digits than its factorization.

9906865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 9906865 is about 3147.5172755682. The cubic root of 9906865 is about 214.7725375157.

The spelling of 9906865 in words is "nine million, nine hundred six thousand, eight hundred sixty-five".