2905989 has 4 divisors (see below), whose sum is σ = 3874656. Its totient is φ = 1937324.

The previous prime is 2905961. The next prime is 2905999. The reversal of 2905989 is 9895092.

2905989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2905989 - 2⁹ = 2905477 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2905989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2905919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484329 + ... + 484334.

It is an arithmetic number, because the mean of its divisors is an integer number (968664).

2^2905989 is an apocalyptic number.

It is an amenable number.

2905989 is a deficient number, since it is larger than the sum of its proper divisors (968667).

2905989 is an equidigital number, since it uses as much as digits as its factorization.

2905989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968666.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 2905989 is about 1704.6961606104. The cubic root of 2905989 is about 142.7024147130.

The spelling of 2905989 in words is "two million, nine hundred five thousand, nine hundred eighty-nine".