9721049 has 12 divisors (see below), whose sum is σ = 10652796. Its totient is φ = 8865792.

The previous prime is 9721039. The next prime is 9721067. The reversal of 9721049 is 9401279.

It can be written as a sum of positive squares in 6 ways, for example, as 1194649 + 8526400 = 1093^2 + 2920^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9721049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9721039) 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 11 ways as a sum of consecutive naturals, for example, 16097 + ... + 16689.

It is an arithmetic number, because the mean of its divisors is an integer number (887733).

Almost surely, 2^9721049 is an apocalyptic number.

It is an amenable number.

9721049 is a deficient number, since it is larger than the sum of its proper divisors (931747).

9721049 is a wasteful number, since it uses less digits than its factorization.

9721049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 9721049 is about 3117.8596825386. The cubic root of 9721049 is about 213.4212753206.

The spelling of 9721049 in words is "nine million, seven hundred twenty-one thousand, forty-nine".