9949475209 has 2 divisors, whose sum is σ = 9949475210. Its totient is φ = 9949475208.

The previous prime is 9949475069. The next prime is 9949475231. The reversal of 9949475209 is 9025749499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5144905984 + 4804569225 = 71728^2 + 69315^2 .

It is a cyclic number.

It is not a de Polignac number, because 9949475209 - 2²⁹ = 9412604297 is a prime.

It is a super-3 number, since 3×9949475209³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (9949475279) 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, 4974737604 + 4974737605.

It is an arithmetic number, because the mean of its divisors is an integer number (4974737605).

Almost surely, 2^9949475209 is an apocalyptic number.

It is an amenable number.

9949475209 is a deficient number, since it is larger than the sum of its proper divisors (1).

9949475209 is an equidigital number, since it uses as much as digits as its factorization.

9949475209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The square root of 9949475209 is about 99747.0561420236. The cubic root of 9949475209 is about 2150.8001499146.

The spelling of 9949475209 in words is "nine billion, nine hundred forty-nine million, four hundred seventy-five thousand, two hundred nine".