9219972 has 24 divisors (see below), whose sum is σ = 21774816. Its totient is φ = 3035968.

The previous prime is 9219961. The next prime is 9219979. The reversal of 9219972 is 2799129.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9219972.

It is not an unprimeable number, because it can be changed into a prime (9219979) 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 7 ways as a sum of consecutive naturals, for example, 3633 + ... + 5624.

It is an arithmetic number, because the mean of its divisors is an integer number (907284).

Almost surely, 2^9219972 is an apocalyptic number.

It is an amenable number.

9219972 is an abundant number, since it is smaller than the sum of its proper divisors (12554844).

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

9219972 is a wasteful number, since it uses less digits than its factorization.

9219972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9347 (or 9345 counting only the distinct ones).

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

The square root of 9219972 is about 3036.4406794798. The cubic root of 9219972 is about 209.6894275370.

The spelling of 9219972 in words is "nine million, two hundred nineteen thousand, nine hundred seventy-two".