68643345 has 32 divisors (see below), whose sum is σ = 111855744. Its totient is φ = 35942400.

The previous prime is 68643317. The next prime is 68643347. The reversal of 68643345 is 54334686.

It is not a de Polignac number, because 68643345 - 2⁸ = 68643089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68643347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355569 + ... + 355761.

It is an arithmetic number, because the mean of its divisors is an integer number (3495492).

Almost surely, 2^68643345 is an apocalyptic number.

It is an amenable number.

68643345 is a deficient number, since it is larger than the sum of its proper divisors (43212399).

68643345 is a wasteful number, since it uses less digits than its factorization.

68643345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its digits is 207360, while the sum is 39.

The square root of 68643345 is about 8285.1279410761. The cubic root of 68643345 is about 409.4486839378.

The spelling of 68643345 in words is "sixty-eight million, six hundred forty-three thousand, three hundred forty-five".