2049639 has 8 divisors (see below), whose sum is σ = 2893680. Its totient is φ = 1286016.

The previous prime is 2049629. The next prime is 2049643. The reversal of 2049639 is 9369402.

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

It is not a de Polignac number, because 2049639 - 2⁹ = 2049127 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2049629) 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 in 7 ways as a sum of consecutive naturals, for example, 20044 + ... + 20145.

It is an arithmetic number, because the mean of its divisors is an integer number (361710).

2^2049639 is an apocalyptic number.

2049639 is a deficient number, since it is larger than the sum of its proper divisors (844041).

2049639 is a wasteful number, since it uses less digits than its factorization.

2049639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40209.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 2049639 is about 1431.6560341088. The cubic root of 2049639 is about 127.0259520817.

The spelling of 2049639 in words is "two million, forty-nine thousand, six hundred thirty-nine".