138656827 has 2 divisors, whose sum is σ = 138656828. Its totient is φ = 138656826.

The previous prime is 138656789. The next prime is 138656839. The reversal of 138656827 is 728656831.

138656827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138656827 - 2²³ = 130268219 is a prime.

It is not a weakly prime, because it can be changed into another prime (138656027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69328413 + 69328414.

It is an arithmetic number, because the mean of its divisors is an integer number (69328414).

Almost surely, 2^138656827 is an apocalyptic number.

138656827 is a deficient number, since it is larger than the sum of its proper divisors (1).

138656827 is an equidigital number, since it uses as much as digits as its factorization.

138656827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 138656827 is about 11775.2633516198. The cubic root of 138656827 is about 517.5834954389.

The spelling of 138656827 in words is "one hundred thirty-eight million, six hundred fifty-six thousand, eight hundred twenty-seven".