105194909 has 2 divisors, whose sum is σ = 105194910. Its totient is φ = 105194908.

The previous prime is 105194897. The next prime is 105194917. The reversal of 105194909 is 909491501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 34550884 = 8405^2 + 5878^2 .

It is a cyclic number.

It is not a de Polignac number, because 105194909 - 2⁸ = 105194653 is a prime.

It is a super-2 number, since 2×105194909² = 22131937759036562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105124909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52597454 + 52597455.

It is an arithmetic number, because the mean of its divisors is an integer number (52597455).

Almost surely, 2^105194909 is an apocalyptic number.

It is an amenable number.

105194909 is a deficient number, since it is larger than the sum of its proper divisors (1).

105194909 is an equidigital number, since it uses as much as digits as its factorization.

105194909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 105194909 is about 10256.4569418489. The cubic root of 105194909 is about 472.0611290286.

The spelling of 105194909 in words is "one hundred five million, one hundred ninety-four thousand, nine hundred nine".