9997212 has 12 divisors (see below), whose sum is σ = 23326856. Its totient is φ = 3332400.

The previous prime is 9997201. The next prime is 9997219. The reversal of 9997212 is 2127999.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416539 + ... + 416562.

Almost surely, 2^9997212 is an apocalyptic number.

It is an amenable number.

9997212 is an abundant number, since it is smaller than the sum of its proper divisors (13329644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9997212 is a wasteful number, since it uses less digits than its factorization.

9997212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833108 (or 833106 counting only the distinct ones).

The product of its digits is 20412, while the sum is 39.

The square root of 9997212 is about 3161.8368079330. The cubic root of 9997212 is about 215.4234452625.

The spelling of 9997212 in words is "nine million, nine hundred ninety-seven thousand, two hundred twelve".