138307123 has 2 divisors, whose sum is σ = 138307124. Its totient is φ = 138307122.

The previous prime is 138307097. The next prime is 138307139. The reversal of 138307123 is 321703831.

138307123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138307123 - 2²¹ = 136209971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138307091 and 138307100.

It is not a weakly prime, because it can be changed into another prime (138307153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69153561 + 69153562.

It is an arithmetic number, because the mean of its divisors is an integer number (69153562).

Almost surely, 2^138307123 is an apocalyptic number.

138307123 is a deficient number, since it is larger than the sum of its proper divisors (1).

138307123 is an equidigital number, since it uses as much as digits as its factorization.

138307123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 138307123 is about 11760.4048824860. The cubic root of 138307123 is about 517.1479996356.

The spelling of 138307123 in words is "one hundred thirty-eight million, three hundred seven thousand, one hundred twenty-three".