100199999 has 2 divisors, whose sum is σ = 100200000. Its totient is φ = 100199998.

The previous prime is 100199993. The next prime is 100200011. The reversal of 100199999 is 999991001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100199999 - 2²⁴ = 83422783 is a prime.

It is a Sophie Germain prime.

100199999 is a modest number, since divided by 99999 gives 1001 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100199993) 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, 50099999 + 50100000.

It is an arithmetic number, because the mean of its divisors is an integer number (50100000).

Almost surely, 2^100199999 is an apocalyptic number.

100199999 is a deficient number, since it is larger than the sum of its proper divisors (1).

100199999 is an equidigital number, since it uses as much as digits as its factorization.

100199999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 100199999 is about 10009.9949550437. The cubic root of 100199999 is about 464.4681150078.

The spelling of 100199999 in words is "one hundred million, one hundred ninety-nine thousand, nine hundred ninety-nine".