139208509439 has 8 divisors (see below), whose sum is σ = 143110970688. Its totient is φ = 135313420320.

The previous prime is 139208509423. The next prime is 139208509457. The reversal of 139208509439 is 934905802931.

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

It is a cyclic number.

It is not a de Polignac number, because 139208509439 - 2⁴ = 139208509423 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 (139208509469) 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, 1804727 + ... + 1880280.

It is an arithmetic number, because the mean of its divisors is an integer number (17888871336).

Almost surely, 2^139208509439 is an apocalyptic number.

139208509439 is a deficient number, since it is larger than the sum of its proper divisors (3902461249).

139208509439 is a wasteful number, since it uses less digits than its factorization.

139208509439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686065.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 139208509439 in words is "one hundred thirty-nine billion, two hundred eight million, five hundred nine thousand, four hundred thirty-nine".