138606449 has 2 divisors, whose sum is σ = 138606450. Its totient is φ = 138606448.

The previous prime is 138606437. The next prime is 138606469. The reversal of 138606449 is 944606831.

138606449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124166449 + 14440000 = 11143^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 138606449 - 2¹² = 138602353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138606469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69303224 + 69303225.

It is an arithmetic number, because the mean of its divisors is an integer number (69303225).

Almost surely, 2^138606449 is an apocalyptic number.

It is an amenable number.

138606449 is a deficient number, since it is larger than the sum of its proper divisors (1).

138606449 is an equidigital number, since it uses as much as digits as its factorization.

138606449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 138606449 is about 11773.1240119180. The cubic root of 138606449 is about 517.5208035387.

The spelling of 138606449 in words is "one hundred thirty-eight million, six hundred six thousand, four hundred forty-nine".