9899907 has 4 divisors (see below), whose sum is σ = 13199880. Its totient is φ = 6599936.

The previous prime is 9899891. The next prime is 9899921. The reversal of 9899907 is 7099989.

9899907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9899907 - 2⁴ = 9899891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9899907.

It is not an unprimeable number, because it can be changed into a prime (9899947) 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, 1649982 + ... + 1649987.

It is an arithmetic number, because the mean of its divisors is an integer number (3299970).

Almost surely, 2^9899907 is an apocalyptic number.

9899907 is a deficient number, since it is larger than the sum of its proper divisors (3299973).

9899907 is a wasteful number, since it uses less digits than its factorization.

9899907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299972.

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 9899907 is about 3146.4117658056. The cubic root of 9899907 is about 214.7222445351.

The spelling of 9899907 in words is "nine million, eight hundred ninety-nine thousand, nine hundred seven".