99950009 has 2 divisors, whose sum is σ = 99950010. Its totient is φ = 99950008.

The previous prime is 99950003. The next prime is 99950023. The reversal of 99950009 is 90005999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99940009 + 10000 = 9997^2 + 100^2 .

It is an emirp because it is prime and its reverse (90005999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99950009 - 2¹² = 99945913 is a prime.

It is not a weakly prime, because it can be changed into another prime (99950003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49975004 + 49975005.

It is an arithmetic number, because the mean of its divisors is an integer number (49975005).

Almost surely, 2^99950009 is an apocalyptic number.

It is an amenable number.

99950009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99950009 is an equidigital number, since it uses as much as digits as its factorization.

99950009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32805, while the sum is 41.

The square root of 99950009 is about 9997.5001375344. The cubic root of 99950009 is about 464.0815245799.

The spelling of 99950009 in words is "ninety-nine million, nine hundred fifty thousand, nine".