100111087 has 2 divisors, whose sum is σ = 100111088.
Its totient is φ = 100111086.
The previous prime is 100111073. The next prime is 100111127. The reversal of 100111087 is 780111001.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 100111087 - 223 = 91722479 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (100111007) 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, 50055543 + 50055544.
It is an arithmetic number, because the mean of its divisors is an integer number (50055544).
Almost surely, 2100111087 is an apocalyptic number.
100111087 is a deficient number, since it is larger than the sum of its proper divisors (1).
100111087 is an equidigital number, since it uses as much as digits as its factorization.
100111087 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 56, while the sum is 19.
The square root of 100111087 is about 10005.5528083160.
The cubic root of 100111087 is about 464.3306931504.
Adding to 100111087 its reverse (780111001), we get a palindrome (880222088).
The spelling of 100111087 in words is "one hundred million, one hundred eleven thousand, eighty-seven".