139419173 has 4 divisors (see below), whose sum is σ = 139447308. Its totient is φ = 139391040.

The previous prime is 139419157. The next prime is 139419187. The reversal of 139419173 is 371914931.

139419173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371914931 = 929 ⋅400339.

It can be written as a sum of positive squares in 2 ways, for example, as 37368769 + 102050404 = 6113^2 + 10102^2 .

It is a cyclic number.

It is not a de Polignac number, because 139419173 - 2⁴ = 139419157 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 (139413173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4436 + ... + 17277.

It is an arithmetic number, because the mean of its divisors is an integer number (34861827).

Almost surely, 2^139419173 is an apocalyptic number.

It is an amenable number.

139419173 is a deficient number, since it is larger than the sum of its proper divisors (28135).

139419173 is an equidigital number, since it uses as much as digits as its factorization.

139419173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28134.

The product of its digits is 20412, while the sum is 38.

The square root of 139419173 is about 11807.5896354845. The cubic root of 139419173 is about 518.5303337040.

The spelling of 139419173 in words is "one hundred thirty-nine million, four hundred nineteen thousand, one hundred seventy-three".