43343987 has 4 divisors (see below), whose sum is σ = 43412040. Its totient is φ = 43275936.

The previous prime is 43343981. The next prime is 43344001. The reversal of 43343987 is 78934334.

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 43343987 - 2¹⁶ = 43278451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43343981) 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, 33062 + ... + 34347.

It is an arithmetic number, because the mean of its divisors is an integer number (10853010).

Almost surely, 2^43343987 is an apocalyptic number.

43343987 is a deficient number, since it is larger than the sum of its proper divisors (68053).

43343987 is an equidigital number, since it uses as much as digits as its factorization.

43343987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68052.

The product of its digits is 217728, while the sum is 41.

The square root of 43343987 is about 6583.6150403862. The cubic root of 43343987 is about 351.2715301114.

The spelling of 43343987 in words is "forty-three million, three hundred forty-three thousand, nine hundred eighty-seven".