68819986 has 8 divisors (see below), whose sum is σ = 104252364. Its totient is φ = 34069200.

The previous prime is 68819977. The next prime is 68820007. The reversal of 68819986 is 68991886.

It can be written as a sum of positive squares in 2 ways, for example, as 68574961 + 245025 = 8281^2 + 495^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170145 + ... + 170548.

Almost surely, 2^68819986 is an apocalyptic number.

68819986 is a deficient number, since it is larger than the sum of its proper divisors (35432378).

68819986 is a wasteful number, since it uses less digits than its factorization.

68819986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340796.

The product of its digits is 1492992, while the sum is 55.

The square root of 68819986 is about 8295.7812169801. The cubic root of 68819986 is about 409.7995966873.

The spelling of 68819986 in words is "sixty-eight million, eight hundred nineteen thousand, nine hundred eighty-six".