100587989 has 2 divisors, whose sum is σ = 100587990. Its totient is φ = 100587988.

The previous prime is 100587959. The next prime is 100588063. The reversal of 100587989 is 989785001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61936900 + 38651089 = 7870^2 + 6217^2 .

It is an emirp because it is prime and its reverse (989785001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100587989 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100587959) 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, 50293994 + 50293995.

It is an arithmetic number, because the mean of its divisors is an integer number (50293995).

Almost surely, 2^100587989 is an apocalyptic number.

It is an amenable number.

100587989 is a deficient number, since it is larger than the sum of its proper divisors (1).

100587989 is an equidigital number, since it uses as much as digits as its factorization.

100587989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 100587989 is about 10029.3563602058. The cubic root of 100587989 is about 465.0668405092.

The spelling of 100587989 in words is "one hundred million, five hundred eighty-seven thousand, nine hundred eighty-nine".