2081009 has 8 divisors (see below), whose sum is σ = 2389248.
Its totient is φ = 1775520.
The previous prime is 2080979. The next prime is 2081029. The reversal of 2081009 is 9001802.
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 2081009 - 212 = 2076913 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (2081029) 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, 1349 + ... + 2445.
It is an arithmetic number, because the mean of its divisors is an integer number (298656).
22081009 is an apocalyptic number.
It is an amenable number.
2081009 is a deficient number, since it is larger than the sum of its proper divisors (308239).
2081009 is a wasteful number, since it uses less digits than its factorization.
2081009 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1375.
The product of its (nonzero) digits is 144, while the sum is 20.
The square root of 2081009 is about 1442.5702755845.
The cubic root of 2081009 is about 127.6707234957.
The spelling of 2081009 in words is "two million, eighty-one thousand, nine".