9909997 has 16 divisors (see below), whose sum is σ = 10920960. Its totient is φ = 8955648.

The previous prime is 9909989. The next prime is 9910007. The reversal of 9909997 is 7999099.

It is a cyclic number.

It is not a de Polignac number, because 9909997 - 2³ = 9909989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63043 + ... + 63199.

It is an arithmetic number, because the mean of its divisors is an integer number (682560).

Almost surely, 2^9909997 is an apocalyptic number.

It is an amenable number.

9909997 is a deficient number, since it is larger than the sum of its proper divisors (1010963).

9909997 is a wasteful number, since it uses less digits than its factorization.

9909997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its (nonzero) digits is 413343, while the sum is 52.

The square root of 9909997 is about 3148.0147712487. The cubic root of 9909997 is about 214.7951681769.

The spelling of 9909997 in words is "nine million, nine hundred nine thousand, nine hundred ninety-seven".