138173079 has 16 divisors (see below), whose sum is σ = 202567680. Its totient is φ = 83079360.

The previous prime is 138173069. The next prime is 138173117. The reversal of 138173079 is 970371831.

It is a happy number.

138173079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138173079 - 2⁸ = 138172823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138173069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12294 + ... + 20675.

It is an arithmetic number, because the mean of its divisors is an integer number (12660480).

Almost surely, 2^138173079 is an apocalyptic number.

138173079 is a deficient number, since it is larger than the sum of its proper divisors (64394601).

138173079 is a wasteful number, since it uses less digits than its factorization.

138173079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33110.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 138173079 is about 11754.7045475418. The cubic root of 138173079 is about 516.9808764206.

The spelling of 138173079 in words is "one hundred thirty-eight million, one hundred seventy-three thousand, seventy-nine".