18139127 has 2 divisors, whose sum is σ = 18139128. Its totient is φ = 18139126.

The previous prime is 18139117. The next prime is 18139159. The reversal of 18139127 is 72193181.

It is an a-pointer prime, because the next prime (18139159) can be obtained adding 18139127 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18139127 - 2⁸ = 18138871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18139093 and 18139102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18139117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9069563 + 9069564.

It is an arithmetic number, because the mean of its divisors is an integer number (9069564).

Almost surely, 2^18139127 is an apocalyptic number.

18139127 is a deficient number, since it is larger than the sum of its proper divisors (1).

18139127 is an equidigital number, since it uses as much as digits as its factorization.

18139127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 32.

The square root of 18139127 is about 4259.0054003253. The cubic root of 18139127 is about 262.7476218196.

The spelling of 18139127 in words is "eighteen million, one hundred thirty-nine thousand, one hundred twenty-seven".