100000009999973 has 2 divisors, whose sum is σ = 100000009999974. Its totient is φ = 100000009999972.

The previous prime is 100000009999937. The next prime is 100000009999979. The reversal of 100000009999973 is 379999900000001.

It is a happy number.

Together with previous prime (100000009999937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61340490288289 + 38659519711684 = 7832017^2 + 6217678^2 .

It is a cyclic number.

It is not a de Polignac number, because 100000009999973 - 2⁶ = 100000009999909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100000009999979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000004999986 + 50000004999987.

It is an arithmetic number, because the mean of its divisors is an integer number (50000004999987).

Almost surely, 2^{100000009999973} is an apocalyptic number.

It is an amenable number.

100000009999973 is a deficient number, since it is larger than the sum of its proper divisors (1).

100000009999973 is an equidigital number, since it uses as much as digits as its factorization.

100000009999973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1240029, while the sum is 56.

Adding to 100000009999973 its reverse (379999900000001), we get a palindrome (479999909999974).

The spelling of 100000009999973 in words is "one hundred trillion, nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".