138222377 has 2 divisors, whose sum is σ = 138222378. Its totient is φ = 138222376.

The previous prime is 138222353. The next prime is 138222389. The reversal of 138222377 is 773222831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 50537881 = 9364^2 + 7109^2 .

It is a cyclic number.

It is not a de Polignac number, because 138222377 - 2¹⁰ = 138221353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138222317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69111188 + 69111189.

It is an arithmetic number, because the mean of its divisors is an integer number (69111189).

Almost surely, 2^138222377 is an apocalyptic number.

It is an amenable number.

138222377 is a deficient number, since it is larger than the sum of its proper divisors (1).

138222377 is an equidigital number, since it uses as much as digits as its factorization.

138222377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 138222377 is about 11756.8013081790. The cubic root of 138222377 is about 517.0423526817.

The spelling of 138222377 in words is "one hundred thirty-eight million, two hundred twenty-two thousand, three hundred seventy-seven".