106643 has 4 divisors (see below), whose sum is σ = 108960. Its totient is φ = 104328.
The previous prime is 106637. The next prime is 106649. The reversal of 106643 is 346601.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (106637) and next prime (106649).
It is a cyclic number.
It is not a de Polignac number, because 106643 - 24 = 106627 is a prime.
It is a super-2 number, since 2×1066432 = 22745458898, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (106649) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088 + ... + 1181.
It is an arithmetic number, because the mean of its divisors is an integer number (27240).
2106643 is an apocalyptic number.
106643 is a deficient number, since it is larger than the sum of its proper divisors (2317).
106643 is an equidigital number, since it uses as much as digits as its factorization.
106643 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2316.
The product of its (nonzero) digits is 432, while the sum is 20.
The square root of 106643 is about 326.5623983253. The cubic root of 106643 is about 47.4217363084.
It can be divided in two parts, 10 and 6643, that multiplied together give a triangular number (66430 = T364).
The spelling of 106643 in words is "one hundred six thousand, six hundred forty-three".
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