68243879 has 6 divisors (see below), whose sum is σ = 75012000. Its totient is φ = 62039780.

The previous prime is 68243869. The next prime is 68243887. The reversal of 68243879 is 97834286.

It is not a de Polignac number, because 68243879 - 2⁴ = 68243863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68243849) 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 5 ways as a sum of consecutive naturals, for example, 281879 + ... + 282120.

It is an arithmetic number, because the mean of its divisors is an integer number (12502000).

Almost surely, 2^68243879 is an apocalyptic number.

68243879 is a deficient number, since it is larger than the sum of its proper divisors (6768121).

68243879 is a wasteful number, since it uses less digits than its factorization.

68243879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564021 (or 564010 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 68243879 is about 8260.9853528499. The cubic root of 68243879 is about 408.6528838722.

The spelling of 68243879 in words is "sixty-eight million, two hundred forty-three thousand, eight hundred seventy-nine".