9909001001 has 2 divisors, whose sum is σ = 9909001002. Its totient is φ = 9909001000.

The previous prime is 9909000911. The next prime is 9909001009. The reversal of 9909001001 is 1001009099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6407202025 + 3501798976 = 80045^2 + 59176^2 .

It is an emirp because it is prime and its reverse (1001009099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9909001001 - 2²² = 9904806697 is a prime.

It is not a weakly prime, because it can be changed into another prime (9909001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4954500500 + 4954500501.

It is an arithmetic number, because the mean of its divisors is an integer number (4954500501).

Almost surely, 2^9909001001 is an apocalyptic number.

It is an amenable number.

9909001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

9909001001 is an equidigital number, since it uses as much as digits as its factorization.

9909001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 9909001001 is about 99543.9651661516. The cubic root of 9909001001 is about 2147.8797197756.

The spelling of 9909001001 in words is "nine billion, nine hundred nine million, one thousand, one".