138719727 has 12 divisors (see below), whose sum is σ = 201250920. Its totient is φ = 92074608.

The previous prime is 138719723. The next prime is 138719753. The reversal of 138719727 is 727917831.

138719727 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 138719727 - 2² = 138719723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138719723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31593 + ... + 35714.

It is an arithmetic number, because the mean of its divisors is an integer number (16770910).

Almost surely, 2^138719727 is an apocalyptic number.

138719727 is a deficient number, since it is larger than the sum of its proper divisors (62531193).

138719727 is a wasteful number, since it uses less digits than its factorization.

138719727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67542 (or 67539 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 138719727 is about 11777.9339020051. The cubic root of 138719727 is about 517.6617487807.

The spelling of 138719727 in words is "one hundred thirty-eight million, seven hundred nineteen thousand, seven hundred twenty-seven".