2011001989 has 8 divisors (see below), whose sum is σ = 2061686592. Its totient is φ = 1960395360.

The previous prime is 2011001981. The next prime is 2011001999. The reversal of 2011001989 is 9891001102.

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 2011001989 - 2³ = 2011001981 is a prime.

It is a super-2 number, since 2×2011001989² = 8088257999523912242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011001989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011001981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34602 + ... + 72244.

It is an arithmetic number, because the mean of its divisors is an integer number (257710824).

Almost surely, 2^2011001989 is an apocalyptic number.

It is an amenable number.

2011001989 is a deficient number, since it is larger than the sum of its proper divisors (50684603).

2011001989 is a wasteful number, since it uses less digits than its factorization.

2011001989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38987.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 2011001989 is about 44844.1968263453. The cubic root of 2011001989 is about 1262.2270994498.

The spelling of 2011001989 in words is "two billion, eleven million, one thousand, nine hundred eighty-nine".