138019529 has 2 divisors, whose sum is σ = 138019530. Its totient is φ = 138019528.

The previous prime is 138019523. The next prime is 138019547. The reversal of 138019529 is 925910831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84143929 + 53875600 = 9173^2 + 7340^2 .

It is a cyclic number.

It is not a de Polignac number, because 138019529 - 2¹⁶ = 137953993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138019492 and 138019501.

It is not a weakly prime, because it can be changed into another prime (138019523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69009764 + 69009765.

It is an arithmetic number, because the mean of its divisors is an integer number (69009765).

Almost surely, 2^138019529 is an apocalyptic number.

It is an amenable number.

138019529 is a deficient number, since it is larger than the sum of its proper divisors (1).

138019529 is an equidigital number, since it uses as much as digits as its factorization.

138019529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 138019529 is about 11748.1713045052. The cubic root of 138019529 is about 516.7893006620.

The spelling of 138019529 in words is "one hundred thirty-eight million, nineteen thousand, five hundred twenty-nine".