3147439 has 4 divisors (see below), whose sum is σ = 3187360. Its totient is φ = 3107520.

The previous prime is 3147433. The next prime is 3147451. The reversal of 3147439 is 9347413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9347413 = 107 ⋅87359.

It is a cyclic number.

It is not a de Polignac number, because 3147439 - 2⁷ = 3147311 is a prime.

It is an Ulam number.

It is a Duffinian number.

3147439 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3147439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3147433) 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, 19842 + ... + 19999.

It is an arithmetic number, because the mean of its divisors is an integer number (796840).

Almost surely, 2^3147439 is an apocalyptic number.

3147439 is a deficient number, since it is larger than the sum of its proper divisors (39921).

3147439 is an equidigital number, since it uses as much as digits as its factorization.

3147439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39920.

The product of its digits is 9072, while the sum is 31.

The square root of 3147439 is about 1774.1023082111. The cubic root of 3147439 is about 146.5499835269.

It can be divided in two parts, 31474 and 39, that added together give a palindrome (31513).

The spelling of 3147439 in words is "three million, one hundred forty-seven thousand, four hundred thirty-nine".