2644897 has 4 divisors (see below), whose sum is σ = 2650816. Its totient is φ = 2638980.

The previous prime is 2644891. The next prime is 2644903. The reversal of 2644897 is 7984462.

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: 7984462 = 2 ⋅3992231.

It is an interprime number because it is at equal distance from previous prime (2644891) and next prime (2644903).

It is a cyclic number.

It is not a de Polignac number, because 2644897 - 2⁷ = 2644769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2229 + ... + 3202.

It is an arithmetic number, because the mean of its divisors is an integer number (662704).

2^2644897 is an apocalyptic number.

It is an amenable number.

2644897 is a deficient number, since it is larger than the sum of its proper divisors (5919).

2644897 is an equidigital number, since it uses as much as digits as its factorization.

2644897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918.

The product of its digits is 96768, while the sum is 40.

The square root of 2644897 is about 1626.3139303345. The cubic root of 2644897 is about 138.2938672273.

The spelling of 2644897 in words is "two million, six hundred forty-four thousand, eight hundred ninety-seven".