68748689 has 4 divisors (see below), whose sum is σ = 69416256. Its totient is φ = 68081124.

The previous prime is 68748683. The next prime is 68748703. The reversal of 68748689 is 98684786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68748689 - 2¹² = 68744593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68748683) 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, 333629 + ... + 333834.

It is an arithmetic number, because the mean of its divisors is an integer number (17354064).

Almost surely, 2^68748689 is an apocalyptic number.

It is an amenable number.

68748689 is a deficient number, since it is larger than the sum of its proper divisors (667567).

68748689 is a wasteful number, since it uses less digits than its factorization.

68748689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667566.

The product of its digits is 4644864, while the sum is 56.

The square root of 68748689 is about 8291.4829192371. The cubic root of 68748689 is about 409.6580313318.

The spelling of 68748689 in words is "sixty-eight million, seven hundred forty-eight thousand, six hundred eighty-nine".