68783899 has 4 divisors (see below), whose sum is σ = 68895640. Its totient is φ = 68672160.

The previous prime is 68783879. The next prime is 68783909. The reversal of 68783899 is 99838786.

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 68783899 - 2⁵ = 68783867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68783879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54942 + ... + 56179.

It is an arithmetic number, because the mean of its divisors is an integer number (17223910).

Almost surely, 2^68783899 is an apocalyptic number.

68783899 is a deficient number, since it is larger than the sum of its proper divisors (111741).

68783899 is a wasteful number, since it uses less digits than its factorization.

68783899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111740.

The product of its digits is 5225472, while the sum is 58.

The square root of 68783899 is about 8293.6059105795. The cubic root of 68783899 is about 409.7279555623.

The spelling of 68783899 in words is "sixty-eight million, seven hundred eighty-three thousand, eight hundred ninety-nine".