100687187 has 4 divisors (see below), whose sum is σ = 100707936. Its totient is φ = 100666440.

The previous prime is 100687157. The next prime is 100687189. The reversal of 100687187 is 781786001.

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 100687187 - 2¹⁸ = 100425043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100687187.

It is not an unprimeable number, because it can be changed into a prime (100687189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238 + ... + 14244.

It is an arithmetic number, because the mean of its divisors is an integer number (25176984).

Almost surely, 2^100687187 is an apocalyptic number.

100687187 is a deficient number, since it is larger than the sum of its proper divisors (20749).

100687187 is an equidigital number, since it uses as much as digits as its factorization.

100687187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20748.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 100687187 is about 10034.3005237037. The cubic root of 100687187 is about 465.2196703643.

The spelling of 100687187 in words is "one hundred million, six hundred eighty-seven thousand, one hundred eighty-seven".