2013649 has 4 divisors (see below), whose sum is σ = 2196720. Its totient is φ = 1830580.

The previous prime is 2013619. The next prime is 2013653. The reversal of 2013649 is 9463102.

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 2013649 - 2⁵ = 2013617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2013619) 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 3 ways as a sum of consecutive naturals, for example, 91519 + ... + 91540.

It is an arithmetic number, because the mean of its divisors is an integer number (549180).

2^2013649 is an apocalyptic number.

It is an amenable number.

2013649 is a deficient number, since it is larger than the sum of its proper divisors (183071).

2013649 is a wasteful number, since it uses less digits than its factorization.

2013649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183070.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2013649 is about 1419.0310074132. The cubic root of 2013649 is about 126.2780664981.

It can be divided in two parts, 2013 and 649, that added together give a palindrome (2662).

The spelling of 2013649 in words is "two million, thirteen thousand, six hundred forty-nine".