2905689 has 12 divisors (see below), whose sum is σ = 4090416. Its totient is φ = 1834488.

The previous prime is 2905687. The next prime is 2905703. The reversal of 2905689 is 9865092.

It is a happy number.

2905689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2905689 - 2¹ = 2905687 is a prime.

2905689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2905687) 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 11 ways as a sum of consecutive naturals, for example, 259 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (340868).

2^2905689 is an apocalyptic number.

It is an amenable number.

2905689 is a deficient number, since it is larger than the sum of its proper divisors (1184727).

2905689 is a wasteful number, since it uses less digits than its factorization.

2905689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 2905689 is about 1704.6081661191. The cubic root of 2905689 is about 142.6975039124.

The spelling of 2905689 in words is "two million, nine hundred five thousand, six hundred eighty-nine".