5091439 has 4 divisors (see below), whose sum is σ = 5109840. Its totient is φ = 5073040.

The previous prime is 5091413. The next prime is 5091451. The reversal of 5091439 is 9341905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9341905 = 5 ⋅1868381.

It is a cyclic number.

It is not a de Polignac number, because 5091439 - 2⁵ = 5091407 is a prime.

It is a Smith number, since the sum of its digits (31) 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.

5091439 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5091439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5011439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8779 + ... + 9340.

It is an arithmetic number, because the mean of its divisors is an integer number (1277460).

Almost surely, 2^5091439 is an apocalyptic number.

5091439 is a deficient number, since it is larger than the sum of its proper divisors (18401).

5091439 is a wasteful number, since it uses less digits than its factorization.

5091439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18400.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 5091439 is about 2256.4217247669. The cubic root of 5091439 is about 172.0336940481.

The spelling of 5091439 in words is "five million, ninety-one thousand, four hundred thirty-nine".