68979188 has 6 divisors (see below), whose sum is σ = 120713586. Its totient is φ = 34489592.

The previous prime is 68979187. The next prime is 68979191. The reversal of 68979188 is 88197986.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56220004 + 12759184 = 7498^2 + 3572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68979187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8622395 + ... + 8622402.

It is an arithmetic number, because the mean of its divisors is an integer number (20118931).

Almost surely, 2^68979188 is an apocalyptic number.

It is an amenable number.

68979188 is a deficient number, since it is larger than the sum of its proper divisors (51734398).

68979188 is a wasteful number, since it uses less digits than its factorization.

68979188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17244801 (or 17244799 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 56.

The square root of 68979188 is about 8305.3710332531. The cubic root of 68979188 is about 410.1153512437.

The spelling of 68979188 in words is "sixty-eight million, nine hundred seventy-nine thousand, one hundred eighty-eight".