123606734213 has 4 divisors (see below), whose sum is σ = 124881030540. Its totient is φ = 122332437888.

The previous prime is 123606734149. The next prime is 123606734219. The reversal of 123606734213 is 312437606321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312437606321 = 39341 ⋅7941781.

It can be written as a sum of positive squares in 2 ways, for example, as 87676394404 + 35930339809 = 296102^2 + 189553^2 .

It is a cyclic number.

It is not a de Polignac number, because 123606734213 - 2⁶ = 123606734149 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 (123606734219) 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 in 3 ways as a sum of consecutive naturals, for example, 637148018 + ... + 637148211.

It is an arithmetic number, because the mean of its divisors is an integer number (31220257635).

Almost surely, 2^123606734213 is an apocalyptic number.

It is an amenable number.

123606734213 is a deficient number, since it is larger than the sum of its proper divisors (1274296327).

123606734213 is an equidigital number, since it uses as much as digits as its factorization.

123606734213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274296326.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 123606734213 in words is "one hundred twenty-three billion, six hundred six million, seven hundred thirty-four thousand, two hundred thirteen".