123320730029 has 4 divisors (see below), whose sum is σ = 140937977184. Its totient is φ = 105703482876.

The previous prime is 123320730019. The next prime is 123320730059. The reversal of 123320730029 is 920037023321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 920037023321 = 13 ⋅70772078717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123320730029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123320729977 and 123320730004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123320730019) 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, 8808623567 + ... + 8808623580.

It is an arithmetic number, because the mean of its divisors is an integer number (35234494296).

Almost surely, 2^123320730029 is an apocalyptic number.

It is an amenable number.

123320730029 is a deficient number, since it is larger than the sum of its proper divisors (17617247155).

123320730029 is an equidigital number, since it uses as much as digits as its factorization.

123320730029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17617247154.

The product of its (nonzero) digits is 13608, while the sum is 32.

The spelling of 123320730029 in words is "one hundred twenty-three billion, three hundred twenty million, seven hundred thirty thousand, twenty-nine".