9906807 has 4 divisors (see below), whose sum is σ = 13209080. Its totient is φ = 6604536.

The previous prime is 9906791. The next prime is 9906833. The reversal of 9906807 is 7086099.

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

It is not a de Polignac number, because 9906807 - 2⁴ = 9906791 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 (9906877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1651132 + ... + 1651137.

It is an arithmetic number, because the mean of its divisors is an integer number (3302270).

Almost surely, 2^9906807 is an apocalyptic number.

9906807 is a deficient number, since it is larger than the sum of its proper divisors (3302273).

9906807 is a wasteful number, since it uses less digits than its factorization.

9906807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302272.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 9906807 is about 3147.5080619436. The cubic root of 9906807 is about 214.7721183845.

The spelling of 9906807 in words is "nine million, nine hundred six thousand, eight hundred seven".