2001017687 has 8 divisors (see below), whose sum is σ = 2089069056. Its totient is φ = 1913053912.

The previous prime is 2001017671. The next prime is 2001017693. The reversal of 2001017687 is 7867101002.

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 2001017687 - 2⁴ = 2001017671 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 (2001017617) 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, 27158 + ... + 68844.

It is an arithmetic number, because the mean of its divisors is an integer number (261133632).

Almost surely, 2^2001017687 is an apocalyptic number.

2001017687 is a deficient number, since it is larger than the sum of its proper divisors (88051369).

2001017687 is a wasteful number, since it uses less digits than its factorization.

2001017687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43797.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 2001017687 is about 44732.7361895067. The cubic root of 2001017687 is about 1260.1347145373.

Adding to 2001017687 its reverse (7867101002), we get a palindrome (9868118689).

The spelling of 2001017687 in words is "two billion, one million, seventeen thousand, six hundred eighty-seven".