105955809 has 4 divisors (see below), whose sum is σ = 141274416. Its totient is φ = 70637204.

The previous prime is 105955807. The next prime is 105955819. The reversal of 105955809 is 908559501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105955809 - 2¹ = 105955807 is a prime.

It is a super-2 number, since 2×105955809² = 22453266921688962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105955807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17659299 + ... + 17659304.

It is an arithmetic number, because the mean of its divisors is an integer number (35318604).

Almost surely, 2^105955809 is an apocalyptic number.

It is an amenable number.

105955809 is a deficient number, since it is larger than the sum of its proper divisors (35318607).

105955809 is an equidigital number, since it uses as much as digits as its factorization.

105955809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35318606.

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 105955809 is about 10293.4838125875. The cubic root of 105955809 is about 473.1965728791.

The spelling of 105955809 in words is "one hundred five million, nine hundred fifty-five thousand, eight hundred nine".