68186643 has 32 divisors (see below), whose sum is σ = 110522880. Its totient is φ = 36503040.

The previous prime is 68186641. The next prime is 68186647. The reversal of 68186643 is 34668186.

It is a happy number.

It is not a de Polignac number, because 68186643 - 2¹ = 68186641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68186595 and 68186604.

It is not an unprimeable number, because it can be changed into a prime (68186641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138628 + ... + 139118.

It is an arithmetic number, because the mean of its divisors is an integer number (3453840).

Almost surely, 2^68186643 is an apocalyptic number.

68186643 is a deficient number, since it is larger than the sum of its proper divisors (42336237).

68186643 is a wasteful number, since it uses less digits than its factorization.

68186643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its digits is 165888, while the sum is 42.

The square root of 68186643 is about 8257.5203905289. The cubic root of 68186643 is about 408.5386064757.

The spelling of 68186643 in words is "sixty-eight million, one hundred eighty-six thousand, six hundred forty-three".