139272239 has 4 divisors (see below), whose sum is σ = 144074760. Its totient is φ = 134469720.

The previous prime is 139272229. The next prime is 139272241. The reversal of 139272239 is 932272931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932272931 = 9349 ⋅99719.

It is a cyclic number.

It is not a de Polignac number, because 139272239 - 2¹⁶ = 139206703 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 (139272229) 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, 2401217 + ... + 2401274.

It is an arithmetic number, because the mean of its divisors is an integer number (36018690).

Almost surely, 2^139272239 is an apocalyptic number.

139272239 is a deficient number, since it is larger than the sum of its proper divisors (4802521).

139272239 is an equidigital number, since it uses as much as digits as its factorization.

139272239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4802520.

The product of its digits is 40824, while the sum is 38.

The square root of 139272239 is about 11801.3659802584. The cubic root of 139272239 is about 518.3481098019.

The spelling of 139272239 in words is "one hundred thirty-nine million, two hundred seventy-two thousand, two hundred thirty-nine".