2649739 has 8 divisors (see below), whose sum is σ = 2842560. Its totient is φ = 2461056.

The previous prime is 2649733. The next prime is 2649769. The reversal of 2649739 is 9379462.

2649739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2649739 - 2⁷ = 2649611 is a prime.

It is a super-2 number, since 2×2649739² = 14042233536242, which contains 22 as substring.

It is a Duffinian number.

2649739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2649733) 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 7 ways as a sum of consecutive naturals, for example, 357 + ... + 2329.

It is an arithmetic number, because the mean of its divisors is an integer number (355320).

2^2649739 is an apocalyptic number.

2649739 is a deficient number, since it is larger than the sum of its proper divisors (192821).

2649739 is a wasteful number, since it uses less digits than its factorization.

2649739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

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

The square root of 2649739 is about 1627.8018921232. The cubic root of 2649739 is about 138.3782070835.

The spelling of 2649739 in words is "two million, six hundred forty-nine thousand, seven hundred thirty-nine".