68581306 has 4 divisors (see below), whose sum is σ = 102871962. Its totient is φ = 34290652.

The previous prime is 68581291. The next prime is 68581309. The reversal of 68581306 is 60318586.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 4661281 = 7995^2 + 2159^2 .

It is not an unprimeable number, because it can be changed into a prime (68581309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17145325 + ... + 17145328.

Almost surely, 2^68581306 is an apocalyptic number.

68581306 is a deficient number, since it is larger than the sum of its proper divisors (34290656).

68581306 is a wasteful number, since it uses less digits than its factorization.

68581306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34290655.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 68581306 is about 8281.3830970436. The cubic root of 68581306 is about 409.3252952181.

The spelling of 68581306 in words is "sixty-eight million, five hundred eighty-one thousand, three hundred six".