68716209 has 8 divisors (see below), whose sum is σ = 93571200. Its totient is φ = 44836016.

The previous prime is 68716201. The next prime is 68716213. The reversal of 68716209 is 90261786.

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

It is a cyclic number.

It is not a de Polignac number, because 68716209 - 2³ = 68716201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68716201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243534 + ... + 243815.

It is an arithmetic number, because the mean of its divisors is an integer number (11696400).

Almost surely, 2^68716209 is an apocalyptic number.

It is an amenable number.

68716209 is a deficient number, since it is larger than the sum of its proper divisors (24854991).

68716209 is a wasteful number, since it uses less digits than its factorization.

68716209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487399.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 68716209 is about 8289.5240514761. The cubic root of 68716209 is about 409.5935074890.

The spelling of 68716209 in words is "sixty-eight million, seven hundred sixteen thousand, two hundred nine".