68943859 has 4 divisors (see below), whose sum is σ = 69470280. Its totient is φ = 68417440.

The previous prime is 68943851. The next prime is 68943883. The reversal of 68943859 is 95834986.

It is a happy number.

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 68943859 - 2³ = 68943851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68943851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263014 + ... + 263275.

It is an arithmetic number, because the mean of its divisors is an integer number (17367570).

Almost surely, 2^68943859 is an apocalyptic number.

68943859 is a deficient number, since it is larger than the sum of its proper divisors (526421).

68943859 is a wasteful number, since it uses less digits than its factorization.

68943859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526420.

The product of its digits is 1866240, while the sum is 52.

The square root of 68943859 is about 8303.2438841696. The cubic root of 68943859 is about 410.0453231673.

The spelling of 68943859 in words is "sixty-eight million, nine hundred forty-three thousand, eight hundred fifty-nine".