2731439 has 4 divisors (see below), whose sum is σ = 2749680. Its totient is φ = 2713200.

The previous prime is 2731429. The next prime is 2731493. The reversal of 2731439 is 9341372.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2731439 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 (2731429) 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, 8894 + ... + 9195.

It is an arithmetic number, because the mean of its divisors is an integer number (687420).

2^2731439 is an apocalyptic number.

2731439 is a deficient number, since it is larger than the sum of its proper divisors (18241).

2731439 is a wasteful number, since it uses less digits than its factorization.

2731439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18240.

The product of its digits is 4536, while the sum is 29.

The square root of 2731439 is about 1652.7065680271. The cubic root of 2731439 is about 139.7860507584.

The spelling of 2731439 in words is "two million, seven hundred thirty-one thousand, four hundred thirty-nine".