10000199987 has 2 divisors, whose sum is σ = 10000199988. Its totient is φ = 10000199986.

The previous prime is 10000199983. The next prime is 10000200017. The reversal of 10000199987 is 78999100001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10000199987 - 2² = 10000199983 is a prime.

It is not a weakly prime, because it can be changed into another prime (10000199983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000099993 + 5000099994.

It is an arithmetic number, because the mean of its divisors is an integer number (5000099994).

Almost surely, 2^10000199987 is an apocalyptic number.

10000199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000199987 is an equidigital number, since it uses as much as digits as its factorization.

10000199987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

Adding to 10000199987 its reverse (78999100001), we get a palindrome (88999299988).

The spelling of 10000199987 in words is "ten billion, one hundred ninety-nine thousand, nine hundred eighty-seven".