9749681 has 2 divisors, whose sum is σ = 9749682. Its totient is φ = 9749680.

The previous prime is 9749647. The next prime is 9749693. The reversal of 9749681 is 1869479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7789681 + 1960000 = 2791^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 9749681 - 2¹⁰ = 9748657 is a prime.

It is a super-2 number, since 2×9749681² = 190112559203522, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9749281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4874840 + 4874841.

It is an arithmetic number, because the mean of its divisors is an integer number (4874841).

Almost surely, 2^9749681 is an apocalyptic number.

It is an amenable number.

9749681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9749681 is an equidigital number, since it uses as much as digits as its factorization.

9749681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 9749681 is about 3122.4479179003. The cubic root of 9749681 is about 213.6306041824.

The spelling of 9749681 in words is "nine million, seven hundred forty-nine thousand, six hundred eighty-one".