138727655 has 16 divisors (see below), whose sum is σ = 181881504. Its totient is φ = 100740480.

The previous prime is 138727643. The next prime is 138727657. The reversal of 138727655 is 556727831.

It is a happy number.

It is not a de Polignac number, because 138727655 - 2⁴ = 138727639 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 (138727657) 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, 45437 + ... + 48393.

It is an arithmetic number, because the mean of its divisors is an integer number (11367594).

Almost surely, 2^138727655 is an apocalyptic number.

138727655 is a deficient number, since it is larger than the sum of its proper divisors (43153849).

138727655 is a wasteful number, since it uses less digits than its factorization.

138727655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826.

The product of its digits is 352800, while the sum is 44.

The square root of 138727655 is about 11778.2704587728. The cubic root of 138727655 is about 517.6716102577.

The spelling of 138727655 in words is "one hundred thirty-eight million, seven hundred twenty-seven thousand, six hundred fifty-five".