68321039 has 4 divisors (see below), whose sum is σ = 69340824. Its totient is φ = 67301256.

The previous prime is 68321009. The next prime is 68321041. The reversal of 68321039 is 93012386.

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 68321039 - 2⁸ = 68320783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68320996 and 68321014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68321009) 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, 509792 + ... + 509925.

It is an arithmetic number, because the mean of its divisors is an integer number (17335206).

Almost surely, 2^68321039 is an apocalyptic number.

68321039 is a deficient number, since it is larger than the sum of its proper divisors (1019785).

68321039 is a wasteful number, since it uses less digits than its factorization.

68321039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019784.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 68321039 is about 8265.6541785874. The cubic root of 68321039 is about 408.8068404403.

The spelling of 68321039 in words is "sixty-eight million, three hundred twenty-one thousand, thirty-nine".