9997211 has 8 divisors (see below), whose sum is σ = 12026880. Its totient is φ = 8117928.

The previous prime is 9997201. The next prime is 9997219. The reversal of 9997211 is 1127999.

9997211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-9997211 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9997219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37451 + ... + 37716.

It is an arithmetic number, because the mean of its divisors is an integer number (1503360).

Almost surely, 2^9997211 is an apocalyptic number.

9997211 is a deficient number, since it is larger than the sum of its proper divisors (2029669).

9997211 is a wasteful number, since it uses less digits than its factorization.

9997211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75193.

The product of its digits is 10206, while the sum is 38.

The square root of 9997211 is about 3161.8366497971. The cubic root of 9997211 is about 215.4234380797.

The spelling of 9997211 in words is "nine million, nine hundred ninety-seven thousand, two hundred eleven".