33123138613 has 2 divisors, whose sum is σ = 33123138614. Its totient is φ = 33123138612.

The previous prime is 33123138553. The next prime is 33123138641. The reversal of 33123138613 is 31683132133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28685180689 + 4437957924 = 169367^2 + 66618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33123138613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33123130613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16561569306 + 16561569307.

It is an arithmetic number, because the mean of its divisors is an integer number (16561569307).

Almost surely, 2^33123138613 is an apocalyptic number.

It is an amenable number.

33123138613 is a deficient number, since it is larger than the sum of its proper divisors (1).

33123138613 is an equidigital number, since it uses as much as digits as its factorization.

33123138613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The spelling of 33123138613 in words is "thirty-three billion, one hundred twenty-three million, one hundred thirty-eight thousand, six hundred thirteen".