9907 has 2 divisors, whose sum is σ = 9908.
Its totient is φ = 9906.
The previous prime is 9901. The next prime is 9923. The reversal of 9907 is 7099.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-9907 is a prime.
It is not a weakly prime, because it can be changed into another prime (9901) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953 + 4954.
It is an arithmetic number, because the mean of its divisors is an integer number (4954).
29907 is an apocalyptic number.
9907 is a deficient number, since it is larger than the sum of its proper divisors (1).
9907 is an equidigital number, since it uses as much as digits as its factorization.
9907 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 567, while the sum is 25.
The square root of 9907 is about 99.5339138184.
The cubic root of 9907 is about 21.4773513074.
The spelling of 9907 in words is "nine thousand, nine hundred seven".