9921732 has 12 divisors (see below), whose sum is σ = 23150736. Its totient is φ = 3307240.

The previous prime is 9921731. The next prime is 9921733. The reversal of 9921732 is 2371299.

It is an interprime number because it is at equal distance from previous prime (9921731) and next prime (9921733).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9921693 and 9921702.

It is not an unprimeable number, because it can be changed into a prime (9921731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413394 + ... + 413417.

It is an arithmetic number, because the mean of its divisors is an integer number (1929228).

Almost surely, 2^9921732 is an apocalyptic number.

It is an amenable number.

9921732 is an abundant number, since it is smaller than the sum of its proper divisors (13229004).

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

9921732 is a wasteful number, since it uses less digits than its factorization.

9921732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826818 (or 826816 counting only the distinct ones).

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

The square root of 9921732 is about 3149.8780928792. The cubic root of 9921732 is about 214.8799185225.

The spelling of 9921732 in words is "nine million, nine hundred twenty-one thousand, seven hundred thirty-two".