2064639 has 8 divisors (see below), whose sum is σ = 2775040. Its totient is φ = 1365336.

The previous prime is 2064619. The next prime is 2064649. The reversal of 2064639 is 9364602.

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

It is not a de Polignac number, because 2064639 - 2⁷ = 2064511 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064619) 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, 2329 + ... + 3090.

It is an arithmetic number, because the mean of its divisors is an integer number (346880).

2^2064639 is an apocalyptic number.

2064639 is a deficient number, since it is larger than the sum of its proper divisors (710401).

2064639 is a wasteful number, since it uses less digits than its factorization.

2064639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 2064639 is about 1436.8851728653. The cubic root of 2064639 is about 127.3350731802.

The spelling of 2064639 in words is "two million, sixty-four thousand, six hundred thirty-nine".