43070987 has 4 divisors (see below), whose sum is σ = 43123896. Its totient is φ = 43018080.

The previous prime is 43070981. The next prime is 43070999. The reversal of 43070987 is 78907034.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78907034 = 2 ⋅39453517.

It is a cyclic number.

It is not a de Polignac number, because 43070987 - 2⁴ = 43070971 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 43070987.

It is not an unprimeable number, because it can be changed into a prime (43070981) 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, 25214 + ... + 26867.

It is an arithmetic number, because the mean of its divisors is an integer number (10780974).

Almost surely, 2^43070987 is an apocalyptic number.

43070987 is a deficient number, since it is larger than the sum of its proper divisors (52909).

43070987 is an equidigital number, since it uses as much as digits as its factorization.

43070987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52908.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 43070987 is about 6562.8490002437. The cubic root of 43070987 is about 350.5324874259.

It can be divided in two parts, 430 and 70987, that added together give a palindrome (71417).

The spelling of 43070987 in words is "forty-three million, seventy thousand, nine hundred eighty-seven".