68778859 has 4 divisors (see below), whose sum is σ = 68809104. Its totient is φ = 68748616.

The previous prime is 68778817. The next prime is 68778877. The reversal of 68778859 is 95887786.

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 68778859 - 2¹¹ = 68776811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68778959) 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, 11407 + ... + 16360.

It is an arithmetic number, because the mean of its divisors is an integer number (17202276).

Almost surely, 2^68778859 is an apocalyptic number.

68778859 is a deficient number, since it is larger than the sum of its proper divisors (30245).

68778859 is a wasteful number, since it uses less digits than its factorization.

68778859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30244.

The product of its digits is 6773760, while the sum is 58.

The square root of 68778859 is about 8293.3020564791. The cubic root of 68778859 is about 409.7179479909.

The spelling of 68778859 in words is "sixty-eight million, seven hundred seventy-eight thousand, eight hundred fifty-nine".