100644106 has 4 divisors (see below), whose sum is σ = 150966162. Its totient is φ = 50322052.

The previous prime is 100644101. The next prime is 100644109. The reversal of 100644106 is 601446001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601446001 = 13 ⋅46265077.

It can be written as a sum of positive squares in only one way, i.e., 68211081 + 32433025 = 8259^2 + 5695^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (100644101) 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, 25161025 + ... + 25161028.

Almost surely, 2^100644106 is an apocalyptic number.

100644106 is a deficient number, since it is larger than the sum of its proper divisors (50322056).

100644106 is an equidigital number, since it uses as much as digits as its factorization.

100644106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50322055.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 100644106 is about 10032.1536072770. The cubic root of 100644106 is about 465.1533097599.

The spelling of 100644106 in words is "one hundred million, six hundred forty-four thousand, one hundred six".