840116005 has 4 divisors (see below), whose sum is σ = 1008139212. Its totient is φ = 672092800.

The previous prime is 840115999. The next prime is 840116021. The reversal of 840116005 is 500611048.

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 382241601 + 457874404 = 19551^2 + 21398^2 .

It is not a de Polignac number, because 840116005 - 2¹¹ = 840113957 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, 84011596 + ... + 84011605.

It is an arithmetic number, because the mean of its divisors is an integer number (252034803).

Almost surely, 2^840116005 is an apocalyptic number.

It is an amenable number.

840116005 is a deficient number, since it is larger than the sum of its proper divisors (168023207).

840116005 is a wasteful number, since it uses less digits than its factorization.

840116005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168023206.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 840116005 is about 28984.7546996693. The cubic root of 840116005 is about 943.5822286743.

The spelling of 840116005 in words is "eight hundred forty million, one hundred sixteen thousand, five".