4643989 has 8 divisors (see below), whose sum is σ = 5327168. Its totient is φ = 3965760.

The previous prime is 4643987. The next prime is 4643993. The reversal of 4643989 is 9893464.

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 4643989 - 2¹ = 4643987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4643983) 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, 1069 + ... + 3229.

It is an arithmetic number, because the mean of its divisors is an integer number (665896).

Almost surely, 2^4643989 is an apocalyptic number.

It is an amenable number.

4643989 is a deficient number, since it is larger than the sum of its proper divisors (683179).

4643989 is a wasteful number, since it uses less digits than its factorization.

4643989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475.

The product of its digits is 186624, while the sum is 43.

The square root of 4643989 is about 2154.9916473156. The cubic root of 4643989 is about 166.8388012680.

The spelling of 4643989 in words is "four million, six hundred forty-three thousand, nine hundred eighty-nine".