43312987 has 4 divisors (see below), whose sum is σ = 43352680. Its totient is φ = 43273296.

The previous prime is 43312967. The next prime is 43312999. The reversal of 43312987 is 78921334.

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 43312987 - 2¹⁵ = 43280219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43312967) 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, 18162 + ... + 20407.

It is an arithmetic number, because the mean of its divisors is an integer number (10838170).

Almost surely, 2^43312987 is an apocalyptic number.

43312987 is a deficient number, since it is larger than the sum of its proper divisors (39693).

43312987 is a wasteful number, since it uses less digits than its factorization.

43312987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39692.

The product of its digits is 36288, while the sum is 37.

The square root of 43312987 is about 6581.2602896406. The cubic root of 43312987 is about 351.1877659779.

The spelling of 43312987 in words is "forty-three million, three hundred twelve thousand, nine hundred eighty-seven".