138072117 has 4 divisors (see below), whose sum is σ = 184096160. Its totient is φ = 92048076.

The previous prime is 138072091. The next prime is 138072131. The reversal of 138072117 is 711270831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138072117 - 2¹¹ = 138070069 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 (138072157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23012017 + ... + 23012022.

It is an arithmetic number, because the mean of its divisors is an integer number (46024040).

Almost surely, 2^138072117 is an apocalyptic number.

It is an amenable number.

138072117 is a deficient number, since it is larger than the sum of its proper divisors (46024043).

138072117 is an equidigital number, since it uses as much as digits as its factorization.

138072117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46024042.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 138072117 is about 11750.4092269163. The cubic root of 138072117 is about 516.8549277633.

The spelling of 138072117 in words is "one hundred thirty-eight million, seventy-two thousand, one hundred seventeen".