100002019987 has 2 divisors, whose sum is σ = 100002019988. Its totient is φ = 100002019986.

The previous prime is 100002019979. The next prime is 100002020011. The reversal of 100002019987 is 789910200001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100002019987 - 2³ = 100002019979 is a prime.

It is not a weakly prime, because it can be changed into another prime (100002019927) 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 as a sum of consecutive naturals, namely, 50001009993 + 50001009994.

It is an arithmetic number, because the mean of its divisors is an integer number (50001009994).

Almost surely, 2^100002019987 is an apocalyptic number.

100002019987 is a deficient number, since it is larger than the sum of its proper divisors (1).

100002019987 is an equidigital number, since it uses as much as digits as its factorization.

100002019987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

Adding to 100002019987 its reverse (789910200001), we get a palindrome (889912219988).

The spelling of 100002019987 in words is "one hundred billion, two million, nineteen thousand, nine hundred eighty-seven".