138020833 has 2 divisors, whose sum is σ = 138020834. Its totient is φ = 138020832.

The previous prime is 138020803. The next prime is 138020837. The reversal of 138020833 is 338020831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138015504 + 5329 = 11748^2 + 73^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138020833 is a prime.

It is not a weakly prime, because it can be changed into another prime (138020837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69010416 + 69010417.

It is an arithmetic number, because the mean of its divisors is an integer number (69010417).

Almost surely, 2^138020833 is an apocalyptic number.

It is an amenable number.

138020833 is a deficient number, since it is larger than the sum of its proper divisors (1).

138020833 is an equidigital number, since it uses as much as digits as its factorization.

138020833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 138020833 is about 11748.2268023732. The cubic root of 138020833 is about 516.7909281880.

Subtracting from 138020833 its sum of digits (28), we obtain a triangular number (138020805 = T₁₆₆₁₄).

The spelling of 138020833 in words is "one hundred thirty-eight million, twenty thousand, eight hundred thirty-three".