100090909949 has 2 divisors, whose sum is σ = 100090909950. Its totient is φ = 100090909948.

The previous prime is 100090909889. The next prime is 100090910021. The reversal of 100090909949 is 949909090001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66715273849 + 33375636100 = 258293^2 + 182690^2 .

It is a cyclic number.

It is not a de Polignac number, because 100090909949 - 2¹² = 100090905853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100090909897 and 100090909906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100090909549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50045454974 + 50045454975.

It is an arithmetic number, because the mean of its divisors is an integer number (50045454975).

Almost surely, 2^100090909949 is an apocalyptic number.

It is an amenable number.

100090909949 is a deficient number, since it is larger than the sum of its proper divisors (1).

100090909949 is an equidigital number, since it uses as much as digits as its factorization.

100090909949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 50.

The spelling of 100090909949 in words is "one hundred billion, ninety million, nine hundred nine thousand, nine hundred forty-nine".