100012987 has 2 divisors, whose sum is σ = 100012988. Its totient is φ = 100012986.

The previous prime is 100012963. The next prime is 100013021. The reversal of 100012987 is 789210001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100012987 - 2⁷ = 100012859 is a prime.

100012987 is a modest number, since divided by 12987 gives 100 as remainder.

It is not a weakly prime, because it can be changed into another prime (100013987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50006493 + 50006494.

It is an arithmetic number, because the mean of its divisors is an integer number (50006494).

Almost surely, 2^100012987 is an apocalyptic number.

100012987 is a deficient number, since it is larger than the sum of its proper divisors (1).

100012987 is an equidigital number, since it uses as much as digits as its factorization.

100012987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 100012987 is about 10000.6493289186. The cubic root of 100012987 is about 464.1789759296.

Adding to 100012987 its reverse (789210001), we get a palindrome (889222988).

The spelling of 100012987 in words is "one hundred million, twelve thousand, nine hundred eighty-seven".