2644997 has 4 divisors (see below), whose sum is σ = 2660460. Its totient is φ = 2629536.

The previous prime is 2644981. The next prime is 2645011. The reversal of 2644997 is 7994462.

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 2076481 + 568516 = 1441^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 2644997 - 2⁴ = 2644981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644907) 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, 7472 + ... + 7817.

It is an arithmetic number, because the mean of its divisors is an integer number (665115).

2^2644997 is an apocalyptic number.

It is an amenable number.

2644997 is a deficient number, since it is larger than the sum of its proper divisors (15463).

2644997 is a wasteful number, since it uses less digits than its factorization.

2644997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15462.

The product of its digits is 108864, while the sum is 41.

The square root of 2644997 is about 1626.3446744156. The cubic root of 2644997 is about 138.2956101071.

The spelling of 2644997 in words is "two million, six hundred forty-four thousand, nine hundred ninety-seven".