139115109 has 16 divisors (see below), whose sum is σ = 221202432. Its totient is φ = 76037808.

The previous prime is 139115107. The next prime is 139115113. The reversal of 139115109 is 901511931.

It is not a de Polignac number, because 139115109 - 2¹ = 139115107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139115101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143529 + ... + 144494.

It is an arithmetic number, because the mean of its divisors is an integer number (13825152).

Almost surely, 2^139115109 is an apocalyptic number.

It is an amenable number.

139115109 is a deficient number, since it is larger than the sum of its proper divisors (82087323).

139115109 is a wasteful number, since it uses less digits than its factorization.

139115109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288056.

The product of its (nonzero) digits is 1215, while the sum is 30.

The square root of 139115109 is about 11794.7068212822. The cubic root of 139115109 is about 518.1530992030.

The spelling of 139115109 in words is "one hundred thirty-nine million, one hundred fifteen thousand, one hundred nine".