139030905909 has 16 divisors (see below), whose sum is σ = 213156357632. Its totient is φ = 78958829808.

The previous prime is 139030905869. The next prime is 139030905917. The reversal of 139030905909 is 909509030931.

It is a happy number.

It is not a de Polignac number, because 139030905909 - 2⁷ = 139030905781 is a prime.

It is a super-2 number, since 2×139030905909² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139030905509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20304919 + ... + 20311764.

It is an arithmetic number, because the mean of its divisors is an integer number (13322272352).

Almost surely, 2^139030905909 is an apocalyptic number.

It is an amenable number.

139030905909 is a deficient number, since it is larger than the sum of its proper divisors (74125451723).

139030905909 is a wasteful number, since it uses less digits than its factorization.

139030905909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40616856.

The product of its (nonzero) digits is 295245, while the sum is 48.

The spelling of 139030905909 in words is "one hundred thirty-nine billion, thirty million, nine hundred five thousand, nine hundred nine".