68144439 has 8 divisors (see below), whose sum is σ = 99119232. Its totient is φ = 41299640.

The previous prime is 68144389. The next prime is 68144441. The reversal of 68144439 is 93444186.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68144439 - 2¹¹ = 68142391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68144397 and 68144406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68144039) 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, 1032459 + ... + 1032524.

It is an arithmetic number, because the mean of its divisors is an integer number (12389904).

Almost surely, 2^68144439 is an apocalyptic number.

68144439 is a deficient number, since it is larger than the sum of its proper divisors (30974793).

68144439 is a wasteful number, since it uses less digits than its factorization.

68144439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064997.

The product of its digits is 82944, while the sum is 39.

The square root of 68144439 is about 8254.9645062835. The cubic root of 68144439 is about 408.4543010012.

The spelling of 68144439 in words is "sixty-eight million, one hundred forty-four thousand, four hundred thirty-nine".