68739839 has 8 divisors (see below), whose sum is σ = 78655488. Its totient is φ = 58848120.

The previous prime is 68739817. The next prime is 68739859. The reversal of 68739839 is 93893786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68739839 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 (68739859) 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, 674 + ... + 11744.

It is an arithmetic number, because the mean of its divisors is an integer number (9831936).

Almost surely, 2^68739839 is an apocalyptic number.

68739839 is a deficient number, since it is larger than the sum of its proper divisors (9915649).

68739839 is a wasteful number, since it uses less digits than its factorization.

68739839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11965.

The product of its digits is 1959552, while the sum is 53.

The square root of 68739839 is about 8290.9492218925. The cubic root of 68739839 is about 409.6404521886.

The spelling of 68739839 in words is "sixty-eight million, seven hundred thirty-nine thousand, eight hundred thirty-nine".