138003539 has 2 divisors, whose sum is σ = 138003540. Its totient is φ = 138003538.

The previous prime is 138003529. The next prime is 138003557. The reversal of 138003539 is 935300831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138003539 - 2²⁰ = 136954963 is a prime.

It is not a weakly prime, because it can be changed into another prime (138003529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69001769 + 69001770.

It is an arithmetic number, because the mean of its divisors is an integer number (69001770).

Almost surely, 2^138003539 is an apocalyptic number.

138003539 is a deficient number, since it is larger than the sum of its proper divisors (1).

138003539 is an equidigital number, since it uses as much as digits as its factorization.

138003539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 138003539 is about 11747.4907533481. The cubic root of 138003539 is about 516.7693426650.

The spelling of 138003539 in words is "one hundred thirty-eight million, three thousand, five hundred thirty-nine".