9213972 has 12 divisors (see below), whose sum is σ = 21499296. Its totient is φ = 3071320.

The previous prime is 9213947. The next prime is 9213979. The reversal of 9213972 is 2793129.

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 (9213979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383904 + ... + 383927.

It is an arithmetic number, because the mean of its divisors is an integer number (1791608).

Almost surely, 2^9213972 is an apocalyptic number.

It is an amenable number.

9213972 is an abundant number, since it is smaller than the sum of its proper divisors (12285324).

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

9213972 is a wasteful number, since it uses less digits than its factorization.

9213972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767838 (or 767836 counting only the distinct ones).

The product of its digits is 6804, while the sum is 33.

The square root of 9213972 is about 3035.4525198066. The cubic root of 9213972 is about 209.6439317524.

The spelling of 9213972 in words is "nine million, two hundred thirteen thousand, nine hundred seventy-two".