43459987 has 4 divisors (see below), whose sum is σ = 43569856. Its totient is φ = 43350120.

The previous prime is 43459981. The next prime is 43459991. The reversal of 43459987 is 78995434.

43459987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 43459987 - 2¹⁹ = 42935699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43459987.

It is not an unprimeable number, because it can be changed into a prime (43459981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54339 + ... + 55132.

It is an arithmetic number, because the mean of its divisors is an integer number (10892464).

Almost surely, 2^43459987 is an apocalyptic number.

43459987 is a deficient number, since it is larger than the sum of its proper divisors (109869).

43459987 is a wasteful number, since it uses less digits than its factorization.

43459987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109868.

The product of its digits is 1088640, while the sum is 49.

The square root of 43459987 is about 6592.4189035588. The cubic root of 43459987 is about 351.5846162232.

The spelling of 43459987 in words is "forty-three million, four hundred fifty-nine thousand, nine hundred eighty-seven".