12443987 has 8 divisors (see below), whose sum is σ = 12915840. Its totient is φ = 11975040.

The previous prime is 12443971. The next prime is 12443999. The reversal of 12443987 is 78934421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12443987 - 2⁴ = 12443971 is a prime.

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 12443987.

It is not an unprimeable number, because it can be changed into a prime (12443087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12062 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (1614480).

Almost surely, 2^12443987 is an apocalyptic number.

12443987 is a deficient number, since it is larger than the sum of its proper divisors (471853).

12443987 is an equidigital number, since it uses as much as digits as its factorization.

12443987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453.

The product of its digits is 48384, while the sum is 38.

The square root of 12443987 is about 3527.6035775013. The cubic root of 12443987 is about 231.7322701795.

The spelling of 12443987 in words is "twelve million, four hundred forty-three thousand, nine hundred eighty-seven".