4571989 has 4 divisors (see below), whose sum is σ = 4812640. Its totient is φ = 4331340.

The previous prime is 4571971. The next prime is 4571999. The reversal of 4571989 is 9891754.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4571989 - 2¹¹ = 4569941 is a prime.

It is a super-3 number, since 3×4571989³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4571999) 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 3 ways as a sum of consecutive naturals, for example, 120297 + ... + 120334.

It is an arithmetic number, because the mean of its divisors is an integer number (1203160).

Almost surely, 2^4571989 is an apocalyptic number.

It is an amenable number.

4571989 is a deficient number, since it is larger than the sum of its proper divisors (240651).

4571989 is a wasteful number, since it uses less digits than its factorization.

4571989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240650.

The product of its digits is 90720, while the sum is 43.

The square root of 4571989 is about 2138.2209895144. The cubic root of 4571989 is about 165.9720884992.

The spelling of 4571989 in words is "four million, five hundred seventy-one thousand, nine hundred eighty-nine".