43163987 has 4 divisors (see below), whose sum is σ = 43895640. Its totient is φ = 42432336.

The previous prime is 43163983. The next prime is 43163993. The reversal of 43163987 is 78936134.

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 43163987 - 2² = 43163983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43163983) 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, 365738 + ... + 365855.

It is an arithmetic number, because the mean of its divisors is an integer number (10973910).

Almost surely, 2^43163987 is an apocalyptic number.

43163987 is a deficient number, since it is larger than the sum of its proper divisors (731653).

43163987 is an equidigital number, since it uses as much as digits as its factorization.

43163987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731652.

The product of its digits is 108864, while the sum is 41.

The square root of 43163987 is about 6569.9305171364. The cubic root of 43163987 is about 350.7845990247.

The spelling of 43163987 in words is "forty-three million, one hundred sixty-three thousand, nine hundred eighty-seven".