138433 has 2 divisors, whose sum is σ = 138434. Its totient is φ = 138432.

The previous prime is 138427. The next prime is 138449. The reversal of 138433 is 334831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138384 + 49 = 372^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 138433 - 2⁵ = 138401 is a prime.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (138403) 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, 69216 + 69217.

It is an arithmetic number, because the mean of its divisors is an integer number (69217).

2¹³⁸⁴³³ is an apocalyptic number.

It is an amenable number.

138433 is a deficient number, since it is larger than the sum of its proper divisors (1).

138433 is an equidigital number, since it uses as much as digits as its factorization.

138433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 138433 is about 372.0658543860. The cubic root of 138433 is about 51.7304842124.

The spelling of 138433 in words is "one hundred thirty-eight thousand, four hundred thirty-three".