105565643 has 2 divisors, whose sum is σ = 105565644. Its totient is φ = 105565642.

The previous prime is 105565639. The next prime is 105565651. The reversal of 105565643 is 346565501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105565643 - 2² = 105565639 is a prime.

It is a super-2 number, since 2×105565643² = 22288209964006898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105565613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52782821 + 52782822.

It is an arithmetic number, because the mean of its divisors is an integer number (52782822).

Almost surely, 2^105565643 is an apocalyptic number.

105565643 is a deficient number, since it is larger than the sum of its proper divisors (1).

105565643 is an equidigital number, since it uses as much as digits as its factorization.

105565643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 105565643 is about 10274.5142464255. The cubic root of 105565643 is about 472.6150339068.

The spelling of 105565643 in words is "one hundred five million, five hundred sixty-five thousand, six hundred forty-three".