139819441 has 4 divisors (see below), whose sum is σ = 148044132. Its totient is φ = 131594752.

The previous prime is 139819403. The next prime is 139819453. The reversal of 139819441 is 144918931.

139819441 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: 144918931 = 17 ⋅8524643.

It can be written as a sum of positive squares in 2 ways, for example, as 122213025 + 17606416 = 11055^2 + 4196^2 .

It is a cyclic number.

It is not a de Polignac number, because 139819441 - 2²¹ = 137722289 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139819394 and 139819403.

It is not an unprimeable number, because it can be changed into a prime (139819741) 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, 4112320 + ... + 4112353.

It is an arithmetic number, because the mean of its divisors is an integer number (37011033).

Almost surely, 2^139819441 is an apocalyptic number.

It is an amenable number.

139819441 is a deficient number, since it is larger than the sum of its proper divisors (8224691).

139819441 is an equidigital number, since it uses as much as digits as its factorization.

139819441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224690.

The product of its digits is 31104, while the sum is 40.

The square root of 139819441 is about 11824.5270941378. The cubic root of 139819441 is about 519.0260875929.

The spelling of 139819441 in words is "one hundred thirty-nine million, eight hundred nineteen thousand, four hundred forty-one".