68105643 has 4 divisors (see below), whose sum is σ = 90807528. Its totient is φ = 45403760.

The previous prime is 68105629. The next prime is 68105677. The reversal of 68105643 is 34650186.

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 68105643 - 2¹³ = 68097451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68105603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11350938 + ... + 11350943.

It is an arithmetic number, because the mean of its divisors is an integer number (22701882).

Almost surely, 2^68105643 is an apocalyptic number.

68105643 is a deficient number, since it is larger than the sum of its proper divisors (22701885).

68105643 is a wasteful number, since it uses less digits than its factorization.

68105643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22701884.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 68105643 is about 8252.6143130526. The cubic root of 68105643 is about 408.3767725364.

The spelling of 68105643 in words is "sixty-eight million, one hundred five thousand, six hundred forty-three".