3989005 has 8 divisors (see below), whose sum is σ = 4995072. Its totient is φ = 3052368.

The previous prime is 3989003. The next prime is 3989009. The reversal of 3989005 is 5009893.

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 3989005 - 2¹ = 3989003 is a prime.

It is a Duffinian number.

3989005 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17229 + ... + 17458.

It is an arithmetic number, because the mean of its divisors is an integer number (624384).

Almost surely, 2^3989005 is an apocalyptic number.

It is an amenable number.

3989005 is a deficient number, since it is larger than the sum of its proper divisors (1006067).

3989005 is a wasteful number, since it uses less digits than its factorization.

3989005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34715.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 3989005 is about 1997.2493584928. The cubic root of 3989005 is about 158.5945261070.

The spelling of 3989005 in words is "three million, nine hundred eighty-nine thousand, five".