138878063 has 2 divisors, whose sum is σ = 138878064. Its totient is φ = 138878062.

The previous prime is 138878039. The next prime is 138878137. The reversal of 138878063 is 360878831.

138878063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138878063 - 2⁸ = 138877807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138878023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69439031 + 69439032.

It is an arithmetic number, because the mean of its divisors is an integer number (69439032).

Almost surely, 2^138878063 is an apocalyptic number.

138878063 is a deficient number, since it is larger than the sum of its proper divisors (1).

138878063 is an equidigital number, since it uses as much as digits as its factorization.

138878063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 138878063 is about 11784.6537072584. The cubic root of 138878063 is about 517.8586285545.

The spelling of 138878063 in words is "one hundred thirty-eight million, eight hundred seventy-eight thousand, sixty-three".