138267793 has 2 divisors, whose sum is σ = 138267794. Its totient is φ = 138267792.

The previous prime is 138267763. The next prime is 138267839. The reversal of 138267793 is 397762831.

It is a happy number.

It is an a-pointer prime, because the next prime (138267839) can be obtained adding 138267793 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83759104 + 54508689 = 9152^2 + 7383^2 .

It is a cyclic number.

It is not a de Polignac number, because 138267793 - 2⁵ = 138267761 is a prime.

It is not a weakly prime, because it can be changed into another prime (138267763) 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, 69133896 + 69133897.

It is an arithmetic number, because the mean of its divisors is an integer number (69133897).

Almost surely, 2^138267793 is an apocalyptic number.

It is an amenable number.

138267793 is a deficient number, since it is larger than the sum of its proper divisors (1).

138267793 is an equidigital number, since it uses as much as digits as its factorization.

138267793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 138267793 is about 11758.7326272860. The cubic root of 138267793 is about 517.0989750237.

The spelling of 138267793 in words is "one hundred thirty-eight million, two hundred sixty-seven thousand, seven hundred ninety-three".