123072012823 has 4 divisors (see below), whose sum is σ = 123073816320. Its totient is φ = 123070209328.

The previous prime is 123072012793. The next prime is 123072012827. The reversal of 123072012823 is 328210270321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328210270321 = 8291 ⋅39586331.

It is a cyclic number.

It is not a de Polignac number, because 123072012823 - 2¹³ = 123072004631 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 (123072012827) 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, 795190 + ... + 937267.

It is an arithmetic number, because the mean of its divisors is an integer number (30768454080).

Almost surely, 2^123072012823 is an apocalyptic number.

123072012823 is a deficient number, since it is larger than the sum of its proper divisors (1803497).

123072012823 is an equidigital number, since it uses as much as digits as its factorization.

123072012823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803496.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 123072012823 in words is "one hundred twenty-three billion, seventy-two million, twelve thousand, eight hundred twenty-three".