2740039 has 2 divisors, whose sum is σ = 2740040. Its totient is φ = 2740038.

The previous prime is 2740037. The next prime is 2740051. The reversal of 2740039 is 9300472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2740039 - 2¹ = 2740037 is a prime.

Together with 2740037, it forms a pair of twin primes.

2740039 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2739995 and 2740022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2740037) 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 as a sum of consecutive naturals, namely, 1370019 + 1370020.

It is an arithmetic number, because the mean of its divisors is an integer number (1370020).

2^2740039 is an apocalyptic number.

2740039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740039 is an equidigital number, since it uses as much as digits as its factorization.

2740039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2740039 is about 1655.3063160636. The cubic root of 2740039 is about 139.9326036148.

The spelling of 2740039 in words is "two million, seven hundred forty thousand, thirty-nine".