2739649 has 4 divisors (see below), whose sum is σ = 2988720. Its totient is φ = 2490580.

The previous prime is 2739647. The next prime is 2739673. The reversal of 2739649 is 9469372.

2739649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2739649 - 2¹ = 2739647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2739643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124519 + ... + 124540.

It is an arithmetic number, because the mean of its divisors is an integer number (747180).

2^2739649 is an apocalyptic number.

It is an amenable number.

2739649 is a deficient number, since it is larger than the sum of its proper divisors (249071).

2739649 is a wasteful number, since it uses less digits than its factorization.

2739649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249070.

The product of its digits is 81648, while the sum is 40.

The square root of 2739649 is about 1655.1885089016. The cubic root of 2739649 is about 139.9259642562.

The spelling of 2739649 in words is "two million, seven hundred thirty-nine thousand, six hundred forty-nine".