68682209 has 4 divisors (see below), whose sum is σ = 71668416. Its totient is φ = 65696004.

The previous prime is 68682197. The next prime is 68682217. The reversal of 68682209 is 90228686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-68682209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68682409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493069 + ... + 1493114.

It is an arithmetic number, because the mean of its divisors is an integer number (17917104).

Almost surely, 2^68682209 is an apocalyptic number.

It is an amenable number.

68682209 is a deficient number, since it is larger than the sum of its proper divisors (2986207).

68682209 is a wasteful number, since it uses less digits than its factorization.

68682209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986206.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 68682209 is about 8287.4730165473. The cubic root of 68682209 is about 409.5259422719.

The spelling of 68682209 in words is "sixty-eight million, six hundred eighty-two thousand, two hundred nine".