68979878 has 8 divisors (see below), whose sum is σ = 112876200. Its totient is φ = 31354480.

The previous prime is 68979853. The next prime is 68979907. The reversal of 68979878 is 87897986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68979878.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1567703 + ... + 1567746.

It is an arithmetic number, because the mean of its divisors is an integer number (14109525).

Almost surely, 2^68979878 is an apocalyptic number.

68979878 is a deficient number, since it is larger than the sum of its proper divisors (43896322).

68979878 is a wasteful number, since it uses less digits than its factorization.

68979878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135462.

The product of its digits is 12192768, while the sum is 62.

The square root of 68979878 is about 8305.4125725336. The cubic root of 68979878 is about 410.1167187028.

The spelling of 68979878 in words is "sixty-eight million, nine hundred seventy-nine thousand, eight hundred seventy-eight".