138432773 has 2 divisors, whose sum is σ = 138432774. Its totient is φ = 138432772.

The previous prime is 138432743. The next prime is 138432817. The reversal of 138432773 is 377234831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117657409 + 20775364 = 10847^2 + 4558^2 .

It is a cyclic number.

It is not a de Polignac number, because 138432773 - 2¹⁴ = 138416389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138432743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69216386 + 69216387.

It is an arithmetic number, because the mean of its divisors is an integer number (69216387).

Almost surely, 2^138432773 is an apocalyptic number.

It is an amenable number.

138432773 is a deficient number, since it is larger than the sum of its proper divisors (1).

138432773 is an equidigital number, since it uses as much as digits as its factorization.

138432773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 138432773 is about 11765.7457477204. The cubic root of 138432773 is about 517.3045593678.

The spelling of 138432773 in words is "one hundred thirty-eight million, four hundred thirty-two thousand, seven hundred seventy-three".