123305541013 has 4 divisors (see below), whose sum is σ = 124690996620. Its totient is φ = 121920085408.

The previous prime is 123305540999. The next prime is 123305541043. The reversal of 123305541013 is 310145503321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310145503321 = 67 ⋅4629037363.

It can be written as a sum of positive squares in 2 ways, for example, as 74189230129 + 49116310884 = 272377^2 + 221622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123305541013 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 (123305541043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692727670 + ... + 692727847.

It is an arithmetic number, because the mean of its divisors is an integer number (31172749155).

Almost surely, 2^123305541013 is an apocalyptic number.

It is an amenable number.

123305541013 is a deficient number, since it is larger than the sum of its proper divisors (1385455607).

123305541013 is an equidigital number, since it uses as much as digits as its factorization.

123305541013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385455606.

The product of its (nonzero) digits is 5400, while the sum is 28.

The spelling of 123305541013 in words is "one hundred twenty-three billion, three hundred five million, five hundred forty-one thousand, thirteen".