2897645 has 4 divisors (see below), whose sum is σ = 3477180. Its totient is φ = 2318112.

The previous prime is 2897627. The next prime is 2897689. The reversal of 2897645 is 5467982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 996004 + 1901641 = 998^2 + 1379^2 .

It is a cyclic number.

It is not a de Polignac number, because 2897645 - 2¹⁴ = 2881261 is a prime.

It is a super-3 number, since 3×2897645³ = 72988894762069833375, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 8³ + 9² + 7⁷ + 6⁶ + 4⁸ + 5⁹ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 289760 + ... + 289769.

It is an arithmetic number, because the mean of its divisors is an integer number (869295).

2^2897645 is an apocalyptic number.

It is an amenable number.

2897645 is a deficient number, since it is larger than the sum of its proper divisors (579535).

2897645 is an equidigital number, since it uses as much as digits as its factorization.

2897645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579534.

The product of its digits is 120960, while the sum is 41.

The square root of 2897645 is about 1702.2470443505. The cubic root of 2897645 is about 142.5657027477.

The spelling of 2897645 in words is "two million, eight hundred ninety-seven thousand, six hundred forty-five".