105180109 has 4 divisors (see below), whose sum is σ = 105850204. Its totient is φ = 104510016.

The previous prime is 105180041. The next prime is 105180121. The reversal of 105180109 is 901081501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901081501 = 4391 ⋅205211.

It can be written as a sum of positive squares in 2 ways, for example, as 10176100 + 95004009 = 3190^2 + 9747^2 .

It is a cyclic number.

It is not a de Polignac number, because 105180109 - 2¹³ = 105171917 is a prime.

It is a super-2 number, since 2×105180109² = 22125710658503762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105180169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334812 + ... + 335125.

It is an arithmetic number, because the mean of its divisors is an integer number (26462551).

Almost surely, 2^105180109 is an apocalyptic number.

It is an amenable number.

105180109 is a deficient number, since it is larger than the sum of its proper divisors (670095).

105180109 is an equidigital number, since it uses as much as digits as its factorization.

105180109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670094.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 105180109 is about 10255.7354197542. The cubic root of 105180109 is about 472.0389897050.

The spelling of 105180109 in words is "one hundred five million, one hundred eighty thousand, one hundred nine".