105840643 has 2 divisors, whose sum is σ = 105840644. Its totient is φ = 105840642.

The previous prime is 105840619. The next prime is 105840667. The reversal of 105840643 is 346048501.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (105840619) and next prime (105840667).

It is a cyclic number.

It is not a de Polignac number, because 105840643 - 2⁹ = 105840131 is a prime.

It is a super-2 number, since 2×105840643² = 22404483421306898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105840143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52920321 + 52920322.

It is an arithmetic number, because the mean of its divisors is an integer number (52920322).

Almost surely, 2^105840643 is an apocalyptic number.

105840643 is a deficient number, since it is larger than the sum of its proper divisors (1).

105840643 is an equidigital number, since it uses as much as digits as its factorization.

105840643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 105840643 is about 10287.8881700765. Note that the first 3 decimals coincide. The cubic root of 105840643 is about 473.0250676910.

The spelling of 105840643 in words is "one hundred five million, eight hundred forty thousand, six hundred forty-three".