2649939 has 8 divisors (see below), whose sum is σ = 3541440. Its totient is φ = 1762536.

The previous prime is 2649931. The next prime is 2649967. The reversal of 2649939 is 9399462.

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

It is not a de Polignac number, because 2649939 - 2³ = 2649931 is a prime.

2649939 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2649939.

It is not an unprimeable number, because it can be changed into a prime (2649931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (442680).

2^2649939 is an apocalyptic number.

2649939 is a deficient number, since it is larger than the sum of its proper divisors (891501).

2649939 is a wasteful number, since it uses less digits than its factorization.

2649939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049.

The product of its digits is 104976, while the sum is 42.

The square root of 2649939 is about 1627.8633235011. The cubic root of 2649939 is about 138.3816885515.

The spelling of 2649939 in words is "two million, six hundred forty-nine thousand, nine hundred thirty-nine".