9890149 has 2 divisors, whose sum is σ = 9890150. Its totient is φ = 9890148.

The previous prime is 9890081. The next prime is 9890159. The reversal of 9890149 is 9410989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5094049 + 4796100 = 2257^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 9890149 - 2⁹ = 9889637 is a prime.

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

9890149 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9890159) 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, 4945074 + 4945075.

It is an arithmetic number, because the mean of its divisors is an integer number (4945075).

Almost surely, 2^9890149 is an apocalyptic number.

It is an amenable number.

9890149 is a deficient number, since it is larger than the sum of its proper divisors (1).

9890149 is an equidigital number, since it uses as much as digits as its factorization.

9890149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 9890149 is about 3144.8607282358. The cubic root of 9890149 is about 214.6516732173.

The spelling of 9890149 in words is "nine million, eight hundred ninety thousand, one hundred forty-nine".