9869849 has 6 divisors (see below), whose sum is σ = 10848810. Its totient is φ = 8972480.

The previous prime is 9869801. The next prime is 9869851. The reversal of 9869849 is 9489689.

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 4276624 = 2365^2 + 2068^2 .

It is not a de Polignac number, because 9869849 - 2⁸ = 9869593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9869849.

It is not an unprimeable number, because it can be changed into a prime (9869869) 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 5 ways as a sum of consecutive naturals, for example, 40664 + ... + 40905.

It is an arithmetic number, because the mean of its divisors is an integer number (1808135).

Almost surely, 2^9869849 is an apocalyptic number.

It is an amenable number.

9869849 is a deficient number, since it is larger than the sum of its proper divisors (978961).

9869849 is a wasteful number, since it uses less digits than its factorization.

9869849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81591 (or 81580 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 53.

The square root of 9869849 is about 3141.6315824743. The cubic root of 9869849 is about 214.5047117089.

The spelling of 9869849 in words is "nine million, eight hundred sixty-nine thousand, eight hundred forty-nine".