123136708839 has 8 divisors (see below), whose sum is σ = 164222077440. Its totient is φ = 82071239736.

The previous prime is 123136708811. The next prime is 123136708867. The reversal of 123136708839 is 938807631321.

It is an interprime number because it is at equal distance from previous prime (123136708811) and next prime (123136708867).

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

It is not a de Polignac number, because 123136708839 - 2²⁸ = 122868273383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123136708791 and 123136708800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123136708939) 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, 4960429 + ... + 4985190.

It is an arithmetic number, because the mean of its divisors is an integer number (20527759680).

Almost surely, 2^123136708839 is an apocalyptic number.

123136708839 is a deficient number, since it is larger than the sum of its proper divisors (41085368601).

123136708839 is an equidigital number, since it uses as much as digits as its factorization.

123136708839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9949749.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 123136708839 in words is "one hundred twenty-three billion, one hundred thirty-six million, seven hundred eight thousand, eight hundred thirty-nine".