9999280189 has 2 divisors, whose sum is σ = 9999280190. Its totient is φ = 9999280188.

The previous prime is 9999280177. The next prime is 9999280217. The reversal of 9999280189 is 9810829999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5136588900 + 4862691289 = 71670^2 + 69733^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999280189 - 2²⁷ = 9865062461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999280189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999280169) 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, 4999640094 + 4999640095.

It is an arithmetic number, because the mean of its divisors is an integer number (4999640095).

Almost surely, 2^9999280189 is an apocalyptic number.

It is an amenable number.

9999280189 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999280189 is an equidigital number, since it uses as much as digits as its factorization.

9999280189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 64.

The square root of 9999280189 is about 99996.4008802317. The cubic root of 9999280189 is about 2154.3829959319.

The spelling of 9999280189 in words is "nine billion, nine hundred ninety-nine million, two hundred eighty thousand, one hundred eighty-nine".