105443209 has 2 divisors, whose sum is σ = 105443210. Its totient is φ = 105443208.

The previous prime is 105443203. The next prime is 105443227. The reversal of 105443209 is 902344501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88303609 + 17139600 = 9397^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 105443209 - 2⁹ = 105442697 is a prime.

It is a super-2 number, since 2×105443209² = 22236540648435362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (105443203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52721604 + 52721605.

It is an arithmetic number, because the mean of its divisors is an integer number (52721605).

Almost surely, 2^105443209 is an apocalyptic number.

It is an amenable number.

105443209 is a deficient number, since it is larger than the sum of its proper divisors (1).

105443209 is an equidigital number, since it uses as much as digits as its factorization.

105443209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 105443209 is about 10268.5543773211. The cubic root of 105443209 is about 472.4322517947.

The spelling of 105443209 in words is "one hundred five million, four hundred forty-three thousand, two hundred nine".