138773111 has 2 divisors, whose sum is σ = 138773112. Its totient is φ = 138773110.

The previous prime is 138773101. The next prime is 138773113. The reversal of 138773111 is 111377831.

It is a strong prime.

It is an emirp because it is prime and its reverse (111377831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138773111 is a prime.

Together with 138773113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138773113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69386555 + 69386556.

It is an arithmetic number, because the mean of its divisors is an integer number (69386556).

Almost surely, 2^138773111 is an apocalyptic number.

138773111 is a deficient number, since it is larger than the sum of its proper divisors (1).

138773111 is an equidigital number, since it uses as much as digits as its factorization.

138773111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 32.

The square root of 138773111 is about 11780.1999558581. The cubic root of 138773111 is about 517.7281447943.

The spelling of 138773111 in words is "one hundred thirty-eight million, seven hundred seventy-three thousand, one hundred eleven".