105647 has 4 divisors (see below), whose sum is σ = 109320. Its totient is φ = 101976.

The previous prime is 105619. The next prime is 105649. The reversal of 105647 is 746501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105647 - 2¹⁰ = 104623 is a prime.

It is a super-2 number, since 2×105647² = 22322577218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 105647.

It is not an unprimeable number, because it can be changed into a prime (105649) 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, 1793 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (27330).

2¹⁰⁵⁶⁴⁷ is an apocalyptic number.

105647 is a deficient number, since it is larger than the sum of its proper divisors (3673).

105647 is an equidigital number, since it uses as much as digits as its factorization.

105647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 105647 is about 325.0338443916. The cubic root of 105647 is about 47.2736413890.

The spelling of 105647 in words is "one hundred five thousand, six hundred forty-seven".