68729089 has 18 divisors (see below), whose sum is σ = 81827718. Its totient is φ = 57657600.

The previous prime is 68729053. The next prime is 68729149. The reversal of 68729089 is 98092786.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1210000 + 67519089 = 1100^2 + 8217^2 .

It is not a de Polignac number, because 68729089 - 2¹¹ = 68727041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68729039) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18769 + ... + 22129.

Almost surely, 2^68729089 is an apocalyptic number.

It is an amenable number.

68729089 is a deficient number, since it is larger than the sum of its proper divisors (13098629).

68729089 is a wasteful number, since it uses less digits than its factorization.

68729089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 68729089 is about 8290.3008992436. The cubic root of 68729089 is about 409.6190969623.

The spelling of 68729089 in words is "sixty-eight million, seven hundred twenty-nine thousand, eighty-nine".