138825413 has 2 divisors, whose sum is σ = 138825414. Its totient is φ = 138825412.

The previous prime is 138825397. The next prime is 138825433. The reversal of 138825413 is 314528831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113252164 + 25573249 = 10642^2 + 5057^2 .

It is a cyclic number.

It is not a de Polignac number, because 138825413 - 2⁴ = 138825397 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138825433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69412706 + 69412707.

It is an arithmetic number, because the mean of its divisors is an integer number (69412707).

Almost surely, 2^138825413 is an apocalyptic number.

It is an amenable number.

138825413 is a deficient number, since it is larger than the sum of its proper divisors (1).

138825413 is an equidigital number, since it uses as much as digits as its factorization.

138825413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 138825413 is about 11782.4196581178. The cubic root of 138825413 is about 517.7931785656.

The spelling of 138825413 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, four hundred thirteen".