68544989 has 8 divisors (see below), whose sum is σ = 73913280. Its totient is φ = 63352800.

The previous prime is 68544943. The next prime is 68544997. The reversal of 68544989 is 98944586.

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 68544989 - 2⁸ = 68544733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68544989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68544389) 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, 43217 + ... + 44774.

It is an arithmetic number, because the mean of its divisors is an integer number (9239160).

Almost surely, 2^68544989 is an apocalyptic number.

It is an amenable number.

68544989 is a deficient number, since it is larger than the sum of its proper divisors (5368291).

68544989 is a wasteful number, since it uses less digits than its factorization.

68544989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88051.

The product of its digits is 2488320, while the sum is 53.

The square root of 68544989 is about 8279.1901173967. The cubic root of 68544989 is about 409.2530301828.

The spelling of 68544989 in words is "sixty-eight million, five hundred forty-four thousand, nine hundred eighty-nine".