123606139 has 2 divisors, whose sum is σ = 123606140. Its totient is φ = 123606138.

The previous prime is 123606107. The next prime is 123606151. The reversal of 123606139 is 931606321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123606139 - 2⁵ = 123606107 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123606139.

It is not a weakly prime, because it can be changed into another prime (123606169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61803069 + 61803070.

It is an arithmetic number, because the mean of its divisors is an integer number (61803070).

Almost surely, 2^123606139 is an apocalyptic number.

123606139 is a deficient number, since it is larger than the sum of its proper divisors (1).

123606139 is an equidigital number, since it uses as much as digits as its factorization.

123606139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 123606139 is about 11117.8297792330. The cubic root of 123606139 is about 498.1345676461.

The spelling of 123606139 in words is "one hundred twenty-three million, six hundred six thousand, one hundred thirty-nine".