997844712100133 has 4 divisors (see below), whose sum is σ = 997844775780300. Its totient is φ = 997844648419968.

The previous prime is 997844712100129. The next prime is 997844712100193. The reversal of 997844712100133 is 331001217448799.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 888777226142689 + 109067485957444 = 29812367^2 + 10443538^2 .

It is a cyclic number.

It is not a de Polignac number, because 997844712100133 - 2² = 997844712100129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997844712100123) 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 in 3 ways as a sum of consecutive naturals, for example, 9930143 + ... + 45763491.

It is an arithmetic number, because the mean of its divisors is an integer number (249461193945075).

Almost surely, 2^{997844712100133} is an apocalyptic number.

It is an amenable number.

997844712100133 is a deficient number, since it is larger than the sum of its proper divisors (63680167).

997844712100133 is a wasteful number, since it uses less digits than its factorization.

997844712100133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63680166.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 997844712100133 in words is "nine hundred ninety-seven trillion, eight hundred forty-four billion, seven hundred twelve million, one hundred thousand, one hundred thirty-three".