68200813 has 4 divisors (see below), whose sum is σ = 68222268. Its totient is φ = 68179360.

The previous prime is 68200799. The next prime is 68200817. The reversal of 68200813 is 31800286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45333289 + 22867524 = 6733^2 + 4782^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68200813 is a prime.

It is a Duffinian number.

68200813 is a modest number, since divided by 813 gives 682 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68200817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4906 + ... + 12667.

It is an arithmetic number, because the mean of its divisors is an integer number (17055567).

Almost surely, 2^68200813 is an apocalyptic number.

It is an amenable number.

68200813 is a deficient number, since it is larger than the sum of its proper divisors (21455).

68200813 is a wasteful number, since it uses less digits than its factorization.

68200813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21454.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 68200813 is about 8258.3783517105. The cubic root of 68200813 is about 408.5669042519.

The spelling of 68200813 in words is "sixty-eight million, two hundred thousand, eight hundred thirteen".