9721938 has 16 divisors (see below), whose sum is σ = 19585440. Its totient is φ = 3217056.

The previous prime is 9721937. The next prime is 9721951. The reversal of 9721938 is 8391279.

It is a junction number, because it is equal to n+sod(n) for n = 9721896 and 9721905.

It is not an unprimeable number, because it can be changed into a prime (9721937) 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, 4995 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (1224090).

Almost surely, 2^9721938 is an apocalyptic number.

9721938 is an abundant number, since it is smaller than the sum of its proper divisors (9863502).

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

9721938 is a wasteful number, since it uses less digits than its factorization.

9721938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11801.

The product of its digits is 27216, while the sum is 39.

The square root of 9721938 is about 3118.0022450281. The cubic root of 9721938 is about 213.4277809878.

The spelling of 9721938 in words is "nine million, seven hundred twenty-one thousand, nine hundred thirty-eight".