2897657 has 4 divisors (see below), whose sum is σ = 3311616. Its totient is φ = 2483700.

The previous prime is 2897627. The next prime is 2897689. The reversal of 2897657 is 7567982.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7567982 = 2 ⋅3783991.

It is a cyclic number.

It is not a de Polignac number, because 2897657 - 2¹⁴ = 2881273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2897627) 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 3 ways as a sum of consecutive naturals, for example, 206969 + ... + 206982.

It is an arithmetic number, because the mean of its divisors is an integer number (827904).

2^2897657 is an apocalyptic number.

It is an amenable number.

2897657 is a deficient number, since it is larger than the sum of its proper divisors (413959).

2897657 is an equidigital number, since it uses as much as digits as its factorization.

2897657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413958.

The product of its digits is 211680, while the sum is 44.

The square root of 2897657 is about 1702.2505690996. The cubic root of 2897657 is about 142.5658995496.

The spelling of 2897657 in words is "two million, eight hundred ninety-seven thousand, six hundred fifty-seven".