9721924 has 9 divisors (see below), whose sum is σ = 17024287. Its totient is φ = 4857844.

The previous prime is 9721919. The next prime is 9721927. The reversal of 9721924 is 4291279.

It is a happy number.

The square root of 9721924 is 3118.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9721924.

It is not an unprimeable number, because it can be changed into a prime (9721927) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5457 + ... + 7015.

Almost surely, 2^9721924 is an apocalyptic number.

9721924 is the 3118-th square number.

It is an amenable number.

9721924 is a deficient number, since it is larger than the sum of its proper divisors (7302363).

9721924 is an equidigital number, since it uses as much as digits as its factorization.

9721924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122 (or 1561 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The cubic root of 9721924 is about 213.4276785394.

It can be divided in two parts, 972192 and 4, that added together give a square (972196 = 986²).

The spelling of 9721924 in words is "nine million, seven hundred twenty-one thousand, nine hundred twenty-four".