4638647 has 4 divisors (see below), whose sum is σ = 4995480. Its totient is φ = 4281816.

The previous prime is 4638631. The next prime is 4638659. The reversal of 4638647 is 7468364.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4638647 - 2⁴ = 4638631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4638647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4638607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178397 + ... + 178422.

It is an arithmetic number, because the mean of its divisors is an integer number (1248870).

Almost surely, 2^4638647 is an apocalyptic number.

4638647 is a deficient number, since it is larger than the sum of its proper divisors (356833).

4638647 is a wasteful number, since it uses less digits than its factorization.

4638647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356832.

The product of its digits is 96768, while the sum is 38.

The square root of 4638647 is about 2153.7518427154. The cubic root of 4638647 is about 166.7748049326.

The spelling of 4638647 in words is "four million, six hundred thirty-eight thousand, six hundred forty-seven".