2005687717 has 8 divisors (see below), whose sum is σ = 2201961312. Its totient is φ = 1811737200.

The previous prime is 2005687681. The next prime is 2005687751. The reversal of 2005687717 is 7177865002.

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

It is a cyclic number.

It is not a de Polignac number, because 2005687717 - 2¹⁵ = 2005654949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005687777) 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, 578959 + ... + 582412.

It is an arithmetic number, because the mean of its divisors is an integer number (275245164).

Almost surely, 2^2005687717 is an apocalyptic number.

It is an amenable number.

2005687717 is a deficient number, since it is larger than the sum of its proper divisors (196273595).

2005687717 is a wasteful number, since it uses less digits than its factorization.

2005687717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161539.

The product of its (nonzero) digits is 164640, while the sum is 43.

The square root of 2005687717 is about 44784.9050127384. The cubic root of 2005687717 is about 1261.1142652259.

The spelling of 2005687717 in words is "two billion, five million, six hundred eighty-seven thousand, seven hundred seventeen".