9900971 has 8 divisors (see below), whose sum is σ = 10502304. Its totient is φ = 9313920.

The previous prime is 9900959. The next prime is 9901007. The reversal of 9900971 is 1790099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9900971 - 2⁶ = 9900907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9900931) 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 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 4931.

It is an arithmetic number, because the mean of its divisors is an integer number (1312788).

Almost surely, 2^9900971 is an apocalyptic number.

9900971 is a deficient number, since it is larger than the sum of its proper divisors (601333).

9900971 is a wasteful number, since it uses less digits than its factorization.

9900971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7141.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 9900971 is about 3146.5808427561. The cubic root of 9900971 is about 214.7299367381.

The spelling of 9900971 in words is "nine million, nine hundred thousand, nine hundred seventy-one".