123145223039 has 4 divisors (see below), whose sum is σ = 123305360640. Its totient is φ = 122985085440.

The previous prime is 123145223021. The next prime is 123145223041. The reversal of 123145223039 is 930322541321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930322541321 = 269 ⋅3458448109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123145223039 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 (123145253039) 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 3 ways as a sum of consecutive naturals, for example, 80067647 + ... + 80069184.

It is an arithmetic number, because the mean of its divisors is an integer number (30826340160).

Almost surely, 2^123145223039 is an apocalyptic number.

123145223039 is a deficient number, since it is larger than the sum of its proper divisors (160137601).

123145223039 is an equidigital number, since it uses as much as digits as its factorization.

123145223039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160137600.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 123145223039 in words is "one hundred twenty-three billion, one hundred forty-five million, two hundred twenty-three thousand, thirty-nine".