68841005 has 4 divisors (see below), whose sum is σ = 82609212. Its totient is φ = 55072800.

The previous prime is 68840999. The next prime is 68841013. The reversal of 68841005 is 50014886.

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 39702601 + 29138404 = 6301^2 + 5398^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68841005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6884096 + ... + 6884105.

It is an arithmetic number, because the mean of its divisors is an integer number (20652303).

Almost surely, 2^68841005 is an apocalyptic number.

It is an amenable number.

68841005 is a deficient number, since it is larger than the sum of its proper divisors (13768207).

68841005 is a wasteful number, since it uses less digits than its factorization.

68841005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13768206.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 68841005 is about 8297.0479690068. The cubic root of 68841005 is about 409.8413127713.

The spelling of 68841005 in words is "sixty-eight million, eight hundred forty-one thousand, five".