9921937 has 8 divisors (see below), whose sum is σ = 10091880. Its totient is φ = 9753600.

The previous prime is 9921917. The next prime is 9921983. The reversal of 9921937 is 7391299.

9921937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4309776 + 5612161 = 2076^2 + 2369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9921937 - 2¹⁵ = 9889169 is a prime.

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 9921937.

It is not an unprimeable number, because it can be changed into a prime (9921907) 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, 19239 + ... + 19747.

It is an arithmetic number, because the mean of its divisors is an integer number (1261485).

Almost surely, 2^9921937 is an apocalyptic number.

It is an amenable number.

9921937 is a deficient number, since it is larger than the sum of its proper divisors (169943).

9921937 is a wasteful number, since it uses less digits than its factorization.

9921937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its digits is 30618, while the sum is 40.

The square root of 9921937 is about 3149.9106336530. The cubic root of 9921937 is about 214.8813984416.

The spelling of 9921937 in words is "nine million, nine hundred twenty-one thousand, nine hundred thirty-seven".