138481127 has 2 divisors, whose sum is σ = 138481128. Its totient is φ = 138481126.

The previous prime is 138481117. The next prime is 138481151. The reversal of 138481127 is 721184831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138481127 - 2⁴ = 138481111 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 (138481117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69240563 + 69240564.

It is an arithmetic number, because the mean of its divisors is an integer number (69240564).

Almost surely, 2^138481127 is an apocalyptic number.

138481127 is a deficient number, since it is larger than the sum of its proper divisors (1).

138481127 is an equidigital number, since it uses as much as digits as its factorization.

138481127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 35.

The square root of 138481127 is about 11767.8004316865. The cubic root of 138481127 is about 517.3647831435.

It can be divided in two parts, 138 and 481127, that multiplied together give a triangular number (66395526 = T₁₁₅₂₃).

The spelling of 138481127 in words is "one hundred thirty-eight million, four hundred eighty-one thousand, one hundred twenty-seven".