99100009 has 2 divisors, whose sum is σ = 99100010. Its totient is φ = 99100008.

The previous prime is 99100007. The next prime is 99100019. The reversal of 99100009 is 90000199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86118400 + 12981609 = 9280^2 + 3603^2 .

It is a cyclic number.

It is not a de Polignac number, because 99100009 - 2¹ = 99100007 is a prime.

Together with 99100007, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99100009.

It is not a weakly prime, because it can be changed into another prime (99100007) 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, 49550004 + 49550005.

It is an arithmetic number, because the mean of its divisors is an integer number (49550005).

Almost surely, 2^99100009 is an apocalyptic number.

It is an amenable number.

99100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99100009 is an equidigital number, since it uses as much as digits as its factorization.

99100009 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 28.

The square root of 99100009 is about 9954.8987438346. The cubic root of 99100009 is about 462.7622222769.

The spelling of 99100009 in words is "ninety-nine million, one hundred thousand, nine".