105412909 has 16 divisors (see below), whose sum is σ = 125137408. Its totient is φ = 86918832.

The previous prime is 105412897. The next prime is 105412943. The reversal of 105412909 is 909214501.

It is not a de Polignac number, because 105412909 - 2⁹ = 105412397 is a prime.

It is a super-2 number, since 2×105412909² = 22223762767684562, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105412609) 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 in 15 ways as a sum of consecutive naturals, for example, 17554 + ... + 22780.

It is an arithmetic number, because the mean of its divisors is an integer number (7821088).

Almost surely, 2^105412909 is an apocalyptic number.

It is an amenable number.

105412909 is a deficient number, since it is larger than the sum of its proper divisors (19724499).

105412909 is an equidigital number, since it uses as much as digits as its factorization.

105412909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 105412909 is about 10267.0788932393. The cubic root of 105412909 is about 472.3869949886.

The spelling of 105412909 in words is "one hundred five million, four hundred twelve thousand, nine hundred nine".