9906287 has 4 divisors (see below), whose sum is σ = 9928800. Its totient is φ = 9883776.

The previous prime is 9906271. The next prime is 9906289. The reversal of 9906287 is 7826099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9906287 - 2⁴ = 9906271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9906289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10583 + ... + 11480.

It is an arithmetic number, because the mean of its divisors is an integer number (2482200).

Almost surely, 2^9906287 is an apocalyptic number.

9906287 is a deficient number, since it is larger than the sum of its proper divisors (22513).

9906287 is a wasteful number, since it uses less digits than its factorization.

9906287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22512.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 9906287 is about 3147.4254558289. The cubic root of 9906287 is about 214.7683605825.

It can be divided in two parts, 990628 and 7, that multiplied together give a palindrome (6934396).

The spelling of 9906287 in words is "nine million, nine hundred six thousand, two hundred eighty-seven".