138228067 has 2 divisors, whose sum is σ = 138228068. Its totient is φ = 138228066.

The previous prime is 138228061. The next prime is 138228089. The reversal of 138228067 is 760822831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138228067 - 2²⁷ = 4010339 is a prime.

It is not a weakly prime, because it can be changed into another prime (138228061) 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, 69114033 + 69114034.

It is an arithmetic number, because the mean of its divisors is an integer number (69114034).

Almost surely, 2^138228067 is an apocalyptic number.

138228067 is a deficient number, since it is larger than the sum of its proper divisors (1).

138228067 is an equidigital number, since it uses as much as digits as its factorization.

138228067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 138228067 is about 11757.0432932774. The cubic root of 138228067 is about 517.0494473617.

The spelling of 138228067 in words is "one hundred thirty-eight million, two hundred twenty-eight thousand, sixty-seven".