138436127 has 2 divisors, whose sum is σ = 138436128. Its totient is φ = 138436126.

The previous prime is 138436121. The next prime is 138436139. The reversal of 138436127 is 721634831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138436127 - 2¹⁶ = 138370591 is a prime.

It is a super-2 number, since 2×138436127² = 38329122517520258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138436121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69218063 + 69218064.

It is an arithmetic number, because the mean of its divisors is an integer number (69218064).

Almost surely, 2^138436127 is an apocalyptic number.

138436127 is a deficient number, since it is larger than the sum of its proper divisors (1).

138436127 is an equidigital number, since it uses as much as digits as its factorization.

138436127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 138436127 is about 11765.8882792588. Note that the first 3 decimals coincide. The cubic root of 138436127 is about 517.3087371489.

The spelling of 138436127 in words is "one hundred thirty-eight million, four hundred thirty-six thousand, one hundred twenty-seven".