4663639 has 4 divisors (see below), whose sum is σ = 4681120. Its totient is φ = 4646160.

The previous prime is 4663621. The next prime is 4663643. The reversal of 4663639 is 9363664.

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 4663639 - 2¹⁹ = 4139351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4663598 and 4663607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4663649) 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, 8334 + ... + 8875.

It is an arithmetic number, because the mean of its divisors is an integer number (1170280).

Almost surely, 2^4663639 is an apocalyptic number.

4663639 is a deficient number, since it is larger than the sum of its proper divisors (17481).

4663639 is a wasteful number, since it uses less digits than its factorization.

4663639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17480.

The product of its digits is 69984, while the sum is 37.

The square root of 4663639 is about 2159.5460171064. The cubic root of 4663639 is about 167.0737838350.

The spelling of 4663639 in words is "four million, six hundred sixty-three thousand, six hundred thirty-nine".