9858949 has 2 divisors, whose sum is σ = 9858950. Its totient is φ = 9858948.

The previous prime is 9858887. The next prime is 9858971. The reversal of 9858949 is 9498589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6796449 + 3062500 = 2607^2 + 1750^2 .

It is a cyclic number.

It is not a de Polignac number, because 9858949 - 2⁹ = 9858437 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 9858896 and 9858905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9858349) 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, 4929474 + 4929475.

It is an arithmetic number, because the mean of its divisors is an integer number (4929475).

Almost surely, 2^9858949 is an apocalyptic number.

It is an amenable number.

9858949 is a deficient number, since it is larger than the sum of its proper divisors (1).

9858949 is an equidigital number, since it uses as much as digits as its factorization.

9858949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 9858949 is about 3139.8963358684. The cubic root of 9858949 is about 214.4257181803.

The spelling of 9858949 in words is "nine million, eight hundred fifty-eight thousand, nine hundred forty-nine".