123072105309 has 8 divisors (see below), whose sum is σ = 164144832672. Its totient is φ = 82023724080.

The previous prime is 123072105293. The next prime is 123072105341. The reversal of 123072105309 is 903501270321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123072105309 - 2⁴ = 123072105293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123072105309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123072105379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6074734 + ... + 6094959.

It is an arithmetic number, because the mean of its divisors is an integer number (20518104084).

Almost surely, 2^123072105309 is an apocalyptic number.

It is an amenable number.

123072105309 is a deficient number, since it is larger than the sum of its proper divisors (41072727363).

123072105309 is a wasteful number, since it uses less digits than its factorization.

123072105309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12173067.

The product of its (nonzero) digits is 11340, while the sum is 33.

The spelling of 123072105309 in words is "one hundred twenty-three billion, seventy-two million, one hundred five thousand, three hundred nine".