2747839 has 4 divisors (see below), whose sum is σ = 2751840. Its totient is φ = 2743840.

The previous prime is 2747831. The next prime is 2747851. The reversal of 2747839 is 9387472.

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

It is a cyclic number.

It is not a de Polignac number, because 2747839 - 2³ = 2747831 is a prime.

It is a Duffinian number.

2747839 is a lucky number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2747831) 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, 679 + ... + 2440.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

2^2747839 is an apocalyptic number.

2747839 is a deficient number, since it is larger than the sum of its proper divisors (4001).

2747839 is an equidigital number, since it uses as much as digits as its factorization.

2747839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000.

The product of its digits is 84672, while the sum is 40.

The square root of 2747839 is about 1657.6607011086. The cubic root of 2747839 is about 140.0652586917.

The spelling of 2747839 in words is "two million, seven hundred forty-seven thousand, eight hundred thirty-nine".