68529813 has 32 divisors (see below), whose sum is σ = 104284800. Its totient is φ = 39648000.

The previous prime is 68529803. The next prime is 68529817. The reversal of 68529813 is 31892586.

It is not a de Polignac number, because 68529813 - 2⁵ = 68529781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68529817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96303 + ... + 97011.

It is an arithmetic number, because the mean of its divisors is an integer number (3258900).

Almost surely, 2^68529813 is an apocalyptic number.

It is an amenable number.

68529813 is a deficient number, since it is larger than the sum of its proper divisors (35754987).

68529813 is a wasteful number, since it uses less digits than its factorization.

68529813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 103680, while the sum is 42.

The square root of 68529813 is about 8278.2735518947. The cubic root of 68529813 is about 409.2228248024. Note that the first 3 decimals are identical.

The spelling of 68529813 in words is "sixty-eight million, five hundred twenty-nine thousand, eight hundred thirteen".