9864949 has 2 divisors, whose sum is σ = 9864950. Its totient is φ = 9864948.

The previous prime is 9864937. The next prime is 9864983. The reversal of 9864949 is 9494689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7524049 + 2340900 = 2743^2 + 1530^2 .

It is an emirp because it is prime and its reverse (9494689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9864949 - 2¹³ = 9856757 is a prime.

It is a Chen prime.

9864949 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9864989) 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, 4932474 + 4932475.

It is an arithmetic number, because the mean of its divisors is an integer number (4932475).

Almost surely, 2^9864949 is an apocalyptic number.

It is an amenable number.

9864949 is a deficient number, since it is larger than the sum of its proper divisors (1).

9864949 is an equidigital number, since it uses as much as digits as its factorization.

9864949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 9864949 is about 3140.8516361013. The cubic root of 9864949 is about 214.4692080562.

The spelling of 9864949 in words is "nine million, eight hundred sixty-four thousand, nine hundred forty-nine".