9872749 has 2 divisors, whose sum is σ = 9872750. Its totient is φ = 9872748.

The previous prime is 9872741. The next prime is 9872791. The reversal of 9872749 is 9472789.

9872749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9030025 + 842724 = 3005^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 9872749 - 2³ = 9872741 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 9872699 and 9872708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9872741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4936374 + 4936375.

It is an arithmetic number, because the mean of its divisors is an integer number (4936375).

Almost surely, 2^9872749 is an apocalyptic number.

It is an amenable number.

9872749 is a deficient number, since it is larger than the sum of its proper divisors (1).

9872749 is an equidigital number, since it uses as much as digits as its factorization.

9872749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 9872749 is about 3142.0930921919. The cubic root of 9872749 is about 214.5257185398.

The spelling of 9872749 in words is "nine million, eight hundred seventy-two thousand, seven hundred forty-nine".