138326849 has 2 divisors, whose sum is σ = 138326850. Its totient is φ = 138326848.

The previous prime is 138326843. The next prime is 138326861. The reversal of 138326849 is 948623831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129800449 + 8526400 = 11393^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 138326849 - 2¹² = 138322753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138326843) 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, 69163424 + 69163425.

It is an arithmetic number, because the mean of its divisors is an integer number (69163425).

Almost surely, 2^138326849 is an apocalyptic number.

It is an amenable number.

138326849 is a deficient number, since it is larger than the sum of its proper divisors (1).

138326849 is an equidigital number, since it uses as much as digits as its factorization.

138326849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 138326849 is about 11761.2435141868. The cubic root of 138326849 is about 517.1725844781.

The spelling of 138326849 in words is "one hundred thirty-eight million, three hundred twenty-six thousand, eight hundred forty-nine".