68690312 has 16 divisors (see below), whose sum is σ = 131535360. Its totient is φ = 33614224.

The previous prime is 68690291. The next prime is 68690317. The reversal of 68690312 is 21309686.

It is not an unprimeable number, because it can be changed into a prime (68690317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90968 + ... + 91719.

It is an arithmetic number, because the mean of its divisors is an integer number (8220960).

Almost surely, 2^68690312 is an apocalyptic number.

It is an amenable number.

68690312 is a deficient number, since it is larger than the sum of its proper divisors (62845048).

68690312 is a wasteful number, since it uses less digits than its factorization.

68690312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182740 (or 182736 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 68690312 is about 8287.9618724992. The cubic root of 68690312 is about 409.5420466764.

Adding to 68690312 its reverse (21309686), we get a palindrome (89999998).

The spelling of 68690312 in words is "sixty-eight million, six hundred ninety thousand, three hundred twelve".