99901001102809 has 2 divisors, whose sum is σ = 99901001102810. Its totient is φ = 99901001102808.

The previous prime is 99901001102783. The next prime is 99901001102839. The reversal of 99901001102809 is 90820110010999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93148653336025 + 6752347766784 = 9651355^2 + 2598528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99901001102809 is a prime.

It is not a weakly prime, because it can be changed into another prime (99901001102839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49950500551404 + 49950500551405.

It is an arithmetic number, because the mean of its divisors is an integer number (49950500551405).

Almost surely, 2^{99901001102809} is an apocalyptic number.

It is an amenable number.

99901001102809 is a deficient number, since it is larger than the sum of its proper divisors (1).

99901001102809 is an equidigital number, since it uses as much as digits as its factorization.

99901001102809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 99901001102809 in words is "ninety-nine trillion, nine hundred one billion, one million, one hundred two thousand, eight hundred nine".