138911039 has 8 divisors (see below), whose sum is σ = 141774192. Its totient is φ = 136056960.

The previous prime is 138911021. The next prime is 138911083. The reversal of 138911039 is 930119831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138911039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138811039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34727 + ... + 38519.

It is an arithmetic number, because the mean of its divisors is an integer number (17721774).

Almost surely, 2^138911039 is an apocalyptic number.

138911039 is a deficient number, since it is larger than the sum of its proper divisors (2863153).

138911039 is an equidigital number, since it uses as much as digits as its factorization.

138911039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 138911039 is about 11786.0527319370. The cubic root of 138911039 is about 517.8996130804.

The spelling of 138911039 in words is "one hundred thirty-eight million, nine hundred eleven thousand, thirty-nine".