105559609 has 4 divisors (see below), whose sum is σ = 105673204. Its totient is φ = 105446016.

The previous prime is 105559591. The next prime is 105559621. The reversal of 105559609 is 906955501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906955501 = 1487 ⋅609923.

It can be written as a sum of positive squares in 2 ways, for example, as 8970025 + 96589584 = 2995^2 + 9828^2 .

It is a cyclic number.

It is not a de Polignac number, because 105559609 - 2⁵ = 105559577 is a prime.

It is a super-2 number, since 2×105559609² = 22285662104465762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105559709) 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, 55392 + ... + 57265.

It is an arithmetic number, because the mean of its divisors is an integer number (26418301).

Almost surely, 2^105559609 is an apocalyptic number.

It is an amenable number.

105559609 is a deficient number, since it is larger than the sum of its proper divisors (113595).

105559609 is an equidigital number, since it uses as much as digits as its factorization.

105559609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113594.

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 105559609 is about 10274.2206030433. The cubic root of 105559609 is about 472.6060290407.

It can be divided in two parts, 10555 and 9609, that added together give a square (20164 = 142²).

The spelling of 105559609 in words is "one hundred five million, five hundred fifty-nine thousand, six hundred nine".