68362709 has 4 divisors (see below), whose sum is σ = 68436300. Its totient is φ = 68289120.

The previous prime is 68362699. The next prime is 68362711. The reversal of 68362709 is 90726386.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30195025 + 38167684 = 5495^2 + 6178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68362709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68362799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35384 + ... + 37265.

It is an arithmetic number, because the mean of its divisors is an integer number (17109075).

Almost surely, 2^68362709 is an apocalyptic number.

It is an amenable number.

68362709 is a deficient number, since it is larger than the sum of its proper divisors (73591).

68362709 is an equidigital number, since it uses as much as digits as its factorization.

68362709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73590.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 68362709 is about 8268.1744659870. The cubic root of 68362709 is about 408.8899359707.

The spelling of 68362709 in words is "sixty-eight million, three hundred sixty-two thousand, seven hundred nine".