68805839 has 4 divisors (see below), whose sum is σ = 69073824. Its totient is φ = 68537856.

The previous prime is 68805823. The next prime is 68805889. The reversal of 68805839 is 93850886.

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

It is a cyclic number.

It is not a de Polignac number, because 68805839 - 2⁴ = 68805823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68805793 and 68805802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68805809) 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, 133607 + ... + 134120.

It is an arithmetic number, because the mean of its divisors is an integer number (17268456).

Almost surely, 2^68805839 is an apocalyptic number.

68805839 is a deficient number, since it is larger than the sum of its proper divisors (267985).

68805839 is a wasteful number, since it uses less digits than its factorization.

68805839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267984.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 68805839 is about 8294.9285108432. The cubic root of 68805839 is about 409.7715145728.

The spelling of 68805839 in words is "sixty-eight million, eight hundred five thousand, eight hundred thirty-nine".