138764111 has 2 divisors, whose sum is σ = 138764112. Its totient is φ = 138764110.

The previous prime is 138764077. The next prime is 138764161. The reversal of 138764111 is 111467831.

It is a weak prime.

It is an emirp because it is prime and its reverse (111467831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138764111 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 (138764161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69382055 + 69382056.

It is an arithmetic number, because the mean of its divisors is an integer number (69382056).

Almost surely, 2^138764111 is an apocalyptic number.

138764111 is a deficient number, since it is larger than the sum of its proper divisors (1).

138764111 is an equidigital number, since it uses as much as digits as its factorization.

138764111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 138764111 is about 11779.8179527529. The cubic root of 138764111 is about 517.7169522945.

The spelling of 138764111 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, one hundred eleven".