4664639 has 8 divisors (see below), whose sum is σ = 5350560. Its totient is φ = 3983616.

The previous prime is 4664603. The next prime is 4664641. The reversal of 4664639 is 9364664.

It is a happy number.

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

It is not a de Polignac number, because 4664639 - 2¹² = 4660543 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 (4664659) 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, 1127 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (668820).

Almost surely, 2^4664639 is an apocalyptic number.

4664639 is a deficient number, since it is larger than the sum of its proper divisors (685921).

4664639 is a wasteful number, since it uses less digits than its factorization.

4664639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449.

The product of its digits is 93312, while the sum is 38.

The square root of 4664639 is about 2159.7775348401. Note that the first 3 decimals coincide. The cubic root of 4664639 is about 167.0857245709.

The spelling of 4664639 in words is "four million, six hundred sixty-four thousand, six hundred thirty-nine".