123223520439 has 6 divisors (see below), whose sum is σ = 177989529536. Its totient is φ = 82149013620.

The previous prime is 123223520383. The next prime is 123223520467. The reversal of 123223520439 is 934025322321.

123223520439 is a `hidden beast` number, since 123 + 2 + 2 + 3 + 520 + 4 + 3 + 9 = 666.

It is not a de Polignac number, because 123223520439 - 2¹² = 123223516343 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 (123223520639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6845751127 + ... + 6845751144.

Almost surely, 2^123223520439 is an apocalyptic number.

123223520439 is a deficient number, since it is larger than the sum of its proper divisors (54766009097).

123223520439 is a wasteful number, since it uses less digits than its factorization.

123223520439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13691502277 (or 13691502274 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 123223520439 in words is "one hundred twenty-three billion, two hundred twenty-three million, five hundred twenty thousand, four hundred thirty-nine".