138338339 has 2 divisors, whose sum is σ = 138338340. Its totient is φ = 138338338.

The previous prime is 138338311. The next prime is 138338351. The reversal of 138338339 is 933833831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138338339 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 138338296 and 138338305.

It is not a weakly prime, because it can be changed into another prime (138338309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69169169 + 69169170.

It is an arithmetic number, because the mean of its divisors is an integer number (69169170).

Almost surely, 2^138338339 is an apocalyptic number.

138338339 is a deficient number, since it is larger than the sum of its proper divisors (1).

138338339 is an equidigital number, since it uses as much as digits as its factorization.

138338339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 138338339 is about 11761.7319728006. The cubic root of 138338339 is about 517.1869035794.

The spelling of 138338339 in words is "one hundred thirty-eight million, three hundred thirty-eight thousand, three hundred thirty-nine".