68531689 has 8 divisors (see below), whose sum is σ = 73009440. Its totient is φ = 64141056.

The previous prime is 68531677. The next prime is 68531699. The reversal of 68531689 is 98613586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68531689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68531699) 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, 20152 + ... + 23305.

It is an arithmetic number, because the mean of its divisors is an integer number (9126180).

Almost surely, 2^68531689 is an apocalyptic number.

It is an amenable number.

68531689 is a deficient number, since it is larger than the sum of its proper divisors (4477751).

68531689 is a wasteful number, since it uses less digits than its factorization.

68531689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43559.

The product of its digits is 311040, while the sum is 46.

The square root of 68531689 is about 8278.3868597692. The cubic root of 68531689 is about 409.2265589193.

The spelling of 68531689 in words is "sixty-eight million, five hundred thirty-one thousand, six hundred eighty-nine".