9985649 has 2 divisors, whose sum is σ = 9985650. Its totient is φ = 9985648.

The previous prime is 9985637. The next prime is 9985669. The reversal of 9985649 is 9465899.

9985649 is digitally balanced in base 2, 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., 9985600 + 49 = 3160^2 + 7^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9985649 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9985597 and 9985606.

It is not a weakly prime, because it can be changed into another prime (9985669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992824 + 4992825.

It is an arithmetic number, because the mean of its divisors is an integer number (4992825).

Almost surely, 2^9985649 is an apocalyptic number.

It is an amenable number.

9985649 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985649 is an equidigital number, since it uses as much as digits as its factorization.

9985649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 50.

The square root of 9985649 is about 3160.0077531550. The cubic root of 9985649 is about 215.3403586888.

It can be divided in two parts, 99856 and 49, that multiplied together give a square (4892944 = 2212²).

The spelling of 9985649 in words is "nine million, nine hundred eighty-five thousand, six hundred forty-nine".