138207728179 has 2 divisors, whose sum is σ = 138207728180. Its totient is φ = 138207728178.

The previous prime is 138207728147. The next prime is 138207728231. The reversal of 138207728179 is 971827702831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138207728179 - 2⁵ = 138207728147 is a prime.

It is a super-2 number, since 2×138207728179² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138207728279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69103864089 + 69103864090.

It is an arithmetic number, because the mean of its divisors is an integer number (69103864090).

Almost surely, 2^138207728179 is an apocalyptic number.

138207728179 is a deficient number, since it is larger than the sum of its proper divisors (1).

138207728179 is an equidigital number, since it uses as much as digits as its factorization.

138207728179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 138207728179 in words is "one hundred thirty-eight billion, two hundred seven million, seven hundred twenty-eight thousand, one hundred seventy-nine".