4639649 has 8 divisors (see below), whose sum is σ = 5317248. Its totient is φ = 3965760.

The previous prime is 4639643. The next prime is 4639651. The reversal of 4639649 is 9469364.

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

It is a cyclic number.

It is not a de Polignac number, because 4639649 - 2⁴ = 4639633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4639643) 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, 2729 + ... + 4089.

It is an arithmetic number, because the mean of its divisors is an integer number (664656).

Almost surely, 2^4639649 is an apocalyptic number.

It is an amenable number.

4639649 is a deficient number, since it is larger than the sum of its proper divisors (677599).

4639649 is a wasteful number, since it uses less digits than its factorization.

4639649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855.

The product of its digits is 139968, while the sum is 41.

The square root of 4639649 is about 2153.9844474833. The cubic root of 4639649 is about 166.7868124802.

The spelling of 4639649 in words is "four million, six hundred thirty-nine thousand, six hundred forty-nine".