68939439 has 8 divisors (see below), whose sum is σ = 91996032. Its totient is φ = 45921240.

The previous prime is 68939417. The next prime is 68939477. The reversal of 68939439 is 93493986.

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

It is not a de Polignac number, because 68939439 - 2¹² = 68935343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68939391 and 68939400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68939639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107 + ... + 12804.

It is an arithmetic number, because the mean of its divisors is an integer number (11499504).

Almost surely, 2^68939439 is an apocalyptic number.

68939439 is a deficient number, since it is larger than the sum of its proper divisors (23056593).

68939439 is a wasteful number, since it uses less digits than its factorization.

68939439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19197.

The product of its digits is 1259712, while the sum is 51.

The square root of 68939439 is about 8302.9777188669. The cubic root of 68939439 is about 410.0365602932.

It can be divided in two parts, 68939 and 439, that added together give a triangular number (69378 = T₃₇₂).

The spelling of 68939439 in words is "sixty-eight million, nine hundred thirty-nine thousand, four hundred thirty-nine".