105618605 has 4 divisors (see below), whose sum is σ = 126742332. Its totient is φ = 84494880.

The previous prime is 105618593. The next prime is 105618613. The reversal of 105618605 is 506816501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506816501 = 17291 ⋅29311.

It can be written as a sum of positive squares in 2 ways, for example, as 23951236 + 81667369 = 4894^2 + 9037^2 .

It is not a de Polignac number, because 105618605 - 2¹⁴ = 105602221 is a prime.

It is a super-2 number, since 2×105618605² = 22310579444292050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10561856 + ... + 10561865.

It is an arithmetic number, because the mean of its divisors is an integer number (31685583).

Almost surely, 2^105618605 is an apocalyptic number.

It is an amenable number.

105618605 is a deficient number, since it is larger than the sum of its proper divisors (21123727).

105618605 is an equidigital number, since it uses as much as digits as its factorization.

105618605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21123726.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 105618605 is about 10277.0912713666. The cubic root of 105618605 is about 472.6940572581.

The spelling of 105618605 in words is "one hundred five million, six hundred eighteen thousand, six hundred five".