139069439 has 8 divisors (see below), whose sum is σ = 143567952. Its totient is φ = 134628480.

The previous prime is 139069433. The next prime is 139069459. The reversal of 139069439 is 934960931.

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 139069439 - 2⁴ = 139069423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139069439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139069433) 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, 9452 + ... + 19169.

It is an arithmetic number, because the mean of its divisors is an integer number (17945994).

Almost surely, 2^139069439 is an apocalyptic number.

139069439 is a deficient number, since it is larger than the sum of its proper divisors (4498513).

139069439 is a wasteful number, since it uses less digits than its factorization.

139069439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28777.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 139069439 is about 11792.7706244122. The cubic root of 139069439 is about 518.0963916265.

The spelling of 139069439 in words is "one hundred thirty-nine million, sixty-nine thousand, four hundred thirty-nine".