138642103 has 2 divisors, whose sum is σ = 138642104. Its totient is φ = 138642102.

The previous prime is 138642079. The next prime is 138642113. The reversal of 138642103 is 301246831.

It is a strong prime.

It is an emirp because it is prime and its reverse (301246831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138642103 - 2¹⁷ = 138511031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138642113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69321051 + 69321052.

It is an arithmetic number, because the mean of its divisors is an integer number (69321052).

Almost surely, 2^138642103 is an apocalyptic number.

138642103 is a deficient number, since it is larger than the sum of its proper divisors (1).

138642103 is an equidigital number, since it uses as much as digits as its factorization.

138642103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 138642103 is about 11774.6381260742. The cubic root of 138642103 is about 517.5651740207.

Adding to 138642103 its reverse (301246831), we get a palindrome (439888934).

The spelling of 138642103 in words is "one hundred thirty-eight million, six hundred forty-two thousand, one hundred three".