139109073 has 4 divisors (see below), whose sum is σ = 185478768. Its totient is φ = 92739380.

The previous prime is 139109071. The next prime is 139109077. The reversal of 139109073 is 370901931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139109073 - 2¹ = 139109071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139109071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23184843 + ... + 23184848.

It is an arithmetic number, because the mean of its divisors is an integer number (46369692).

Almost surely, 2^139109073 is an apocalyptic number.

It is an amenable number.

139109073 is a deficient number, since it is larger than the sum of its proper divisors (46369695).

139109073 is an equidigital number, since it uses as much as digits as its factorization.

139109073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46369694.

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 139109073 is about 11794.4509410146. The cubic root of 139109073 is about 518.1456051276.

The spelling of 139109073 in words is "one hundred thirty-nine million, one hundred nine thousand, seventy-three".