123813520347 has 16 divisors (see below), whose sum is σ = 180136103040. Its totient is φ = 75020284800.

The previous prime is 123813520309. The next prime is 123813520381. The reversal of 123813520347 is 743025318321.

It is not a de Polignac number, because 123813520347 - 2²⁶ = 123746411483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123813520847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316654 + ... + 589827.

It is an arithmetic number, because the mean of its divisors is an integer number (11258506440).

Almost surely, 2^123813520347 is an apocalyptic number.

123813520347 is a deficient number, since it is larger than the sum of its proper divisors (56322582693).

123813520347 is a wasteful number, since it uses less digits than its factorization.

123813520347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910634.

The product of its (nonzero) digits is 120960, while the sum is 39.

Adding to 123813520347 its reverse (743025318321), we get a palindrome (866838838668).

The spelling of 123813520347 in words is "one hundred twenty-three billion, eight hundred thirteen million, five hundred twenty thousand, three hundred forty-seven".