123503521069 has 2 divisors, whose sum is σ = 123503521070. Its totient is φ = 123503521068.

The previous prime is 123503521049. The next prime is 123503521109. The reversal of 123503521069 is 960125305321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66830005225 + 56673515844 = 258515^2 + 238062^2 .

It is a cyclic number.

It is not a de Polignac number, because 123503521069 - 2⁷ = 123503520941 is a prime.

It is a super-3 number, since 3×123503521069³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123503521049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61751760534 + 61751760535.

It is an arithmetic number, because the mean of its divisors is an integer number (61751760535).

Almost surely, 2^123503521069 is an apocalyptic number.

It is an amenable number.

123503521069 is a deficient number, since it is larger than the sum of its proper divisors (1).

123503521069 is an equidigital number, since it uses as much as digits as its factorization.

123503521069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The spelling of 123503521069 in words is "one hundred twenty-three billion, five hundred three million, five hundred twenty-one thousand, sixty-nine".