9883721 has 4 divisors (see below), whose sum is σ = 10313472. Its totient is φ = 9453972.

The previous prime is 9883673. The next prime is 9883729. The reversal of 9883721 is 1273889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9883721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9883729) 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, 214841 + ... + 214886.

It is an arithmetic number, because the mean of its divisors is an integer number (2578368).

Almost surely, 2^9883721 is an apocalyptic number.

It is an amenable number.

9883721 is a deficient number, since it is larger than the sum of its proper divisors (429751).

9883721 is a wasteful number, since it uses less digits than its factorization.

9883721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429750.

The product of its digits is 24192, while the sum is 38.

The square root of 9883721 is about 3143.8385772810. The cubic root of 9883721 is about 214.6051595943.

The spelling of 9883721 in words is "nine million, eight hundred eighty-three thousand, seven hundred twenty-one".