43040987 has 4 divisors (see below), whose sum is σ = 46953816. Its totient is φ = 39128160.

The previous prime is 43040969. The next prime is 43040993. The reversal of 43040987 is 78904034.

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 43040987 - 2²⁴ = 26263771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43040917) 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, 1956398 + ... + 1956419.

It is an arithmetic number, because the mean of its divisors is an integer number (11738454).

Almost surely, 2^43040987 is an apocalyptic number.

43040987 is a deficient number, since it is larger than the sum of its proper divisors (3912829).

43040987 is a wasteful number, since it uses less digits than its factorization.

43040987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912828.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 43040987 is about 6560.5630093766. The cubic root of 43040987 is about 350.4510836949.

The spelling of 43040987 in words is "forty-three million, forty thousand, nine hundred eighty-seven".