139873223 has 4 divisors (see below), whose sum is σ = 159855120. Its totient is φ = 119891328.

The previous prime is 139873199. The next prime is 139873241. The reversal of 139873223 is 322378931.

It is a happy number.

139873223 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: 322378931 = 7 ⋅46054133.

It is a cyclic number.

It is not a de Polignac number, because 139873223 - 2¹⁴ = 139856839 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 (139873423) 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, 9990938 + ... + 9990951.

It is an arithmetic number, because the mean of its divisors is an integer number (39963780).

Almost surely, 2^139873223 is an apocalyptic number.

139873223 is a deficient number, since it is larger than the sum of its proper divisors (19981897).

139873223 is an equidigital number, since it uses as much as digits as its factorization.

139873223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19981896.

The product of its digits is 54432, while the sum is 38.

The square root of 139873223 is about 11826.8010467751. The cubic root of 139873223 is about 519.0926274162.

The spelling of 139873223 in words is "one hundred thirty-nine million, eight hundred seventy-three thousand, two hundred twenty-three".