123613381673 has 2 divisors, whose sum is σ = 123613381674. Its totient is φ = 123613381672.

The previous prime is 123613381669. The next prime is 123613381679. The reversal of 123613381673 is 376183316321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87150715369 + 36462666304 = 295213^2 + 190952^2 .

It is a cyclic number.

It is not a de Polignac number, because 123613381673 - 2² = 123613381669 is a prime.

It is not a weakly prime, because it can be changed into another prime (123613381679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61806690836 + 61806690837.

It is an arithmetic number, because the mean of its divisors is an integer number (61806690837).

Almost surely, 2^123613381673 is an apocalyptic number.

It is an amenable number.

123613381673 is a deficient number, since it is larger than the sum of its proper divisors (1).

123613381673 is an equidigital number, since it uses as much as digits as its factorization.

123613381673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

Adding to 123613381673 its reverse (376183316321), we get a palindrome (499796697994).

The spelling of 123613381673 in words is "one hundred twenty-three billion, six hundred thirteen million, three hundred eighty-one thousand, six hundred seventy-three".