100012189 has 2 divisors, whose sum is σ = 100012190. Its totient is φ = 100012188.

The previous prime is 100012163. The next prime is 100012217. The reversal of 100012189 is 981210001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95355225 + 4656964 = 9765^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 100012189 - 2⁹ = 100011677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100012589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50006094 + 50006095.

It is an arithmetic number, because the mean of its divisors is an integer number (50006095).

Almost surely, 2^100012189 is an apocalyptic number.

It is an amenable number.

100012189 is a deficient number, since it is larger than the sum of its proper divisors (1).

100012189 is an equidigital number, since it uses as much as digits as its factorization.

100012189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 100012189 is about 10000.6094314297. The cubic root of 100012189 is about 464.1777413705.

The spelling of 100012189 in words is "one hundred million, twelve thousand, one hundred eighty-nine".