4203989 has 4 divisors (see below), whose sum is σ = 4230924. Its totient is φ = 4177056.

The previous prime is 4203973. The next prime is 4204001. The reversal of 4203989 is 9893024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 902500 + 3301489 = 950^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 4203989 - 2⁴ = 4203973 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 2¹³ + 0 + 3⁵ + 9 + 8³ + 9³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4203919) 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, 13232 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (1057731).

Almost surely, 2^4203989 is an apocalyptic number.

It is an amenable number.

4203989 is a deficient number, since it is larger than the sum of its proper divisors (26935).

4203989 is a wasteful number, since it uses less digits than its factorization.

4203989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26934.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 4203989 is about 2050.3631385684. The cubic root of 4203989 is about 161.3939275421.

Adding to 4203989 its sum of digits (35), we get a palindrome (4204024).

The spelling of 4203989 in words is "four million, two hundred three thousand, nine hundred eighty-nine".