9949859 has 2 divisors, whose sum is σ = 9949860. Its totient is φ = 9949858.

The previous prime is 9949831. The next prime is 9949867. The reversal of 9949859 is 9589499.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9949859 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9949859.

It is not a weakly prime, because it can be changed into another prime (9949829) 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, 4974929 + 4974930.

It is an arithmetic number, because the mean of its divisors is an integer number (4974930).

Almost surely, 2^9949859 is an apocalyptic number.

9949859 is a deficient number, since it is larger than the sum of its proper divisors (1).

9949859 is an equidigital number, since it uses as much as digits as its factorization.

9949859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 53.

The square root of 9949859 is about 3154.3397090358. The cubic root of 9949859 is about 215.0827804543.

The spelling of 9949859 in words is "nine million, nine hundred forty-nine thousand, eight hundred fifty-nine".