2001689085 has 96 divisors (see below), whose sum is σ = 3708746496. Its totient is φ = 919987200.

The previous prime is 2001689077. The next prime is 2001689093. The reversal of 2001689085 is 5809861002.

It is an interprime number because it is at equal distance from previous prime (2001689077) and next prime (2001689093).

It is not a de Polignac number, because 2001689085 - 2³ = 2001689077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2752992 + ... + 2753718.

It is an arithmetic number, because the mean of its divisors is an integer number (38632776).

Almost surely, 2^2001689085 is an apocalyptic number.

It is an amenable number.

2001689085 is a deficient number, since it is larger than the sum of its proper divisors (1707057411).

2001689085 is a wasteful number, since it uses less digits than its factorization.

2001689085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 2001689085 is about 44740.2401088774. The cubic root of 2001689085 is about 1260.2756357171.

The spelling of 2001689085 in words is "two billion, one million, six hundred eighty-nine thousand, eighty-five".