138555071 has 2 divisors, whose sum is σ = 138555072. Its totient is φ = 138555070.

The previous prime is 138555041. The next prime is 138555077. The reversal of 138555071 is 170555831.

138555071 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 138555071 - 2⁶ = 138555007 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_7835039 and since 138555071 and 7835039 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138555077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69277535 + 69277536.

It is an arithmetic number, because the mean of its divisors is an integer number (69277536).

Almost surely, 2^138555071 is an apocalyptic number.

138555071 is a deficient number, since it is larger than the sum of its proper divisors (1).

138555071 is an equidigital number, since it uses as much as digits as its factorization.

138555071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 35.

The square root of 138555071 is about 11770.9418059899. The cubic root of 138555071 is about 517.4568515605.

The spelling of 138555071 in words is "one hundred thirty-eight million, five hundred fifty-five thousand, seventy-one".