123006640139 has 2 divisors, whose sum is σ = 123006640140. Its totient is φ = 123006640138.

The previous prime is 123006640021. The next prime is 123006640171. The reversal of 123006640139 is 931046600321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123006640139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123006640099 and 123006640108.

It is not a weakly prime, because it can be changed into another prime (123006640199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61503320069 + 61503320070.

It is an arithmetic number, because the mean of its divisors is an integer number (61503320070).

Almost surely, 2^123006640139 is an apocalyptic number.

123006640139 is a deficient number, since it is larger than the sum of its proper divisors (1).

123006640139 is an equidigital number, since it uses as much as digits as its factorization.

123006640139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 123006640139 in words is "one hundred twenty-three billion, six million, six hundred forty thousand, one hundred thirty-nine".