138181829 has 2 divisors, whose sum is σ = 138181830. Its totient is φ = 138181828.

The previous prime is 138181811. The next prime is 138181853. The reversal of 138181829 is 928181831.

138181829 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., 98049604 + 40132225 = 9902^2 + 6335^2 .

It is a cyclic number.

It is not a de Polignac number, because 138181829 - 2⁸ = 138181573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138181859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69090914 + 69090915.

It is an arithmetic number, because the mean of its divisors is an integer number (69090915).

Almost surely, 2^138181829 is an apocalyptic number.

It is an amenable number.

138181829 is a deficient number, since it is larger than the sum of its proper divisors (1).

138181829 is an equidigital number, since it uses as much as digits as its factorization.

138181829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 41.

The square root of 138181829 is about 11755.0767330545. The cubic root of 138181829 is about 516.9917890316.

The spelling of 138181829 in words is "one hundred thirty-eight million, one hundred eighty-one thousand, eight hundred twenty-nine".