138649033 has 2 divisors, whose sum is σ = 138649034. Its totient is φ = 138649032.

The previous prime is 138649009. The next prime is 138649039. The reversal of 138649033 is 330946831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96294969 + 42354064 = 9813^2 + 6508^2 .

It is a cyclic number.

It is not a de Polignac number, because 138649033 - 2¹³ = 138640841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138648983 and 138649001.

It is not a weakly prime, because it can be changed into another prime (138649039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69324516 + 69324517.

It is an arithmetic number, because the mean of its divisors is an integer number (69324517).

Almost surely, 2^138649033 is an apocalyptic number.

It is an amenable number.

138649033 is a deficient number, since it is larger than the sum of its proper divisors (1).

138649033 is an equidigital number, since it uses as much as digits as its factorization.

138649033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 138649033 is about 11774.9323989567. The cubic root of 138649033 is about 517.5737973437.

The spelling of 138649033 in words is "one hundred thirty-eight million, six hundred forty-nine thousand, thirty-three".