138323079 has 8 divisors (see below), whose sum is σ = 204923120. Its totient is φ = 92215368.

The previous prime is 138323063. The next prime is 138323083. The reversal of 138323079 is 970323831.

It is a happy number.

It is not a de Polignac number, because 138323079 - 2⁴ = 138323063 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 (138323039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561512 + ... + 2561565.

It is an arithmetic number, because the mean of its divisors is an integer number (25615390).

Almost surely, 2^138323079 is an apocalyptic number.

138323079 is a deficient number, since it is larger than the sum of its proper divisors (66600041).

138323079 is an equidigital number, since it uses as much as digits as its factorization.

138323079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123086 (or 5123080 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 138323079 is about 11761.0832409264. The cubic root of 138323079 is about 517.1678860450.

The spelling of 138323079 in words is "one hundred thirty-eight million, three hundred twenty-three thousand, seventy-nine".