43318489 has 4 divisors (see below), whose sum is σ = 44812260. Its totient is φ = 41824720.

The previous prime is 43318487. The next prime is 43318493. The reversal of 43318489 is 98481334.

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 26574025 + 16744464 = 5155^2 + 4092^2 .

It is a cyclic number.

It is not a de Polignac number, because 43318489 - 2¹ = 43318487 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43318481) 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, 746842 + ... + 746899.

It is an arithmetic number, because the mean of its divisors is an integer number (11203065).

Almost surely, 2^43318489 is an apocalyptic number.

It is an amenable number.

43318489 is a deficient number, since it is larger than the sum of its proper divisors (1493771).

43318489 is a wasteful number, since it uses less digits than its factorization.

43318489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493770.

The product of its digits is 82944, while the sum is 40.

The square root of 43318489 is about 6581.6782814112. The cubic root of 43318489 is about 351.2026356772.

The spelling of 43318489 in words is "forty-three million, three hundred eighteen thousand, four hundred eighty-nine".