200143987 has 4 divisors (see below), whose sum is σ = 200409136. Its totient is φ = 199878840.

The previous prime is 200143969. The next prime is 200143997. The reversal of 200143987 is 789341002.

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 200143987 - 2⁷ = 200143859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200143997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131439 + ... + 132952.

It is an arithmetic number, because the mean of its divisors is an integer number (50102284).

Almost surely, 2^200143987 is an apocalyptic number.

200143987 is a deficient number, since it is larger than the sum of its proper divisors (265149).

200143987 is an equidigital number, since it uses as much as digits as its factorization.

200143987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265148.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 200143987 is about 14147.2254170208. The cubic root of 200143987 is about 584.9438541581.

Adding to 200143987 its reverse (789341002), we get a palindrome (989484989).

The spelling of 200143987 in words is "two hundred million, one hundred forty-three thousand, nine hundred eighty-seven".