123319506913 has 2 divisors, whose sum is σ = 123319506914. Its totient is φ = 123319506912.

The previous prime is 123319506857. The next prime is 123319506971. The reversal of 123319506913 is 319605913321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77577846784 + 45741660129 = 278528^2 + 213873^2 .

It is a cyclic number.

It is not a de Polignac number, because 123319506913 - 2¹⁷ = 123319375841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123319506913.

It is not a weakly prime, because it can be changed into another prime (123319509913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61659753456 + 61659753457.

It is an arithmetic number, because the mean of its divisors is an integer number (61659753457).

Almost surely, 2^123319506913 is an apocalyptic number.

It is an amenable number.

123319506913 is a deficient number, since it is larger than the sum of its proper divisors (1).

123319506913 is an equidigital number, since it uses as much as digits as its factorization.

123319506913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 43.

The spelling of 123319506913 in words is "one hundred twenty-three billion, three hundred nineteen million, five hundred six thousand, nine hundred thirteen".