99409189837673 has 2 divisors, whose sum is σ = 99409189837674. Its totient is φ = 99409189837672.

The previous prime is 99409189837669. The next prime is 99409189837709. The reversal of 99409189837673 is 37673898190499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81608241577984 + 17800948259689 = 9033728^2 + 4219117^2 .

It is a cyclic number.

It is not a de Polignac number, because 99409189837673 - 2² = 99409189837669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99409189837591 and 99409189837600.

It is not a weakly prime, because it can be changed into another prime (99409189837613) 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, 49704594918836 + 49704594918837.

It is an arithmetic number, because the mean of its divisors is an integer number (49704594918837).

Almost surely, 2^{99409189837673} is an apocalyptic number.

It is an amenable number.

99409189837673 is a deficient number, since it is larger than the sum of its proper divisors (1).

99409189837673 is an equidigital number, since it uses as much as digits as its factorization.

99409189837673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4444263936, while the sum is 83.

The spelling of 99409189837673 in words is "ninety-nine trillion, four hundred nine billion, one hundred eighty-nine million, eight hundred thirty-seven thousand, six hundred seventy-three".