68739709 has 8 divisors (see below), whose sum is σ = 73255680. Its totient is φ = 64351056.

The previous prime is 68739683. The next prime is 68739719. The reversal of 68739709 is 90793786.

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

It is not a de Polignac number, because 68739709 - 2⁷ = 68739581 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 (68739719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30714 + ... + 32875.

It is an arithmetic number, because the mean of its divisors is an integer number (9156960).

Almost surely, 2^68739709 is an apocalyptic number.

It is an amenable number.

68739709 is a deficient number, since it is larger than the sum of its proper divisors (4515971).

68739709 is a wasteful number, since it uses less digits than its factorization.

68739709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63659.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 68739709 is about 8290.9413820145. The cubic root of 68739709 is about 409.6401939526.

The spelling of 68739709 in words is "sixty-eight million, seven hundred thirty-nine thousand, seven hundred nine".