106646909 has 2 divisors, whose sum is σ = 106646910. Its totient is φ = 106646908.

The previous prime is 106646879. The next prime is 106646959. The reversal of 106646909 is 909646601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103327225 + 3319684 = 10165^2 + 1822^2 .

It is a cyclic number.

It is not a de Polignac number, because 106646909 - 2¹² = 106642813 is a prime.

It is a super-2 number, since 2×106646909² = 22747126398508562, which contains 22 as substring.

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 (106646959) 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, 53323454 + 53323455.

It is an arithmetic number, because the mean of its divisors is an integer number (53323455).

Almost surely, 2^106646909 is an apocalyptic number.

It is an amenable number.

106646909 is a deficient number, since it is larger than the sum of its proper divisors (1).

106646909 is an equidigital number, since it uses as much as digits as its factorization.

106646909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 106646909 is about 10326.9990316645. Note that the first 3 decimals coincide. The cubic root of 106646909 is about 474.2231571604.

The spelling of 106646909 in words is "one hundred six million, six hundred forty-six thousand, nine hundred nine".