68928239 has 4 divisors (see below), whose sum is σ = 69309240. Its totient is φ = 68547240.

The previous prime is 68928203. The next prime is 68928247. The reversal of 68928239 is 93282986.

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 68928239 - 2²⁰ = 67879663 is a prime.

It is a super-2 number, since 2×68928239² = 9502204263282242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68928193 and 68928202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68921239) 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, 190229 + ... + 190590.

It is an arithmetic number, because the mean of its divisors is an integer number (17327310).

Almost surely, 2^68928239 is an apocalyptic number.

68928239 is a deficient number, since it is larger than the sum of its proper divisors (381001).

68928239 is a wasteful number, since it uses less digits than its factorization.

68928239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381000.

The product of its digits is 373248, while the sum is 47.

The square root of 68928239 is about 8302.3032346452. The cubic root of 68928239 is about 410.0143540483.

The spelling of 68928239 in words is "sixty-eight million, nine hundred twenty-eight thousand, two hundred thirty-nine".