6544397 has 4 divisors (see below), whose sum is σ = 6828960. Its totient is φ = 6259836.

The previous prime is 6544393. The next prime is 6544399. The reversal of 6544397 is 7934456.

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.

It is a cyclic number.

It is not a de Polignac number, because 6544397 - 2² = 6544393 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6544397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544393) 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, 142247 + ... + 142292.

It is an arithmetic number, because the mean of its divisors is an integer number (1707240).

Almost surely, 2^6544397 is an apocalyptic number.

It is an amenable number.

6544397 is a deficient number, since it is larger than the sum of its proper divisors (284563).

6544397 is a wasteful number, since it uses less digits than its factorization.

6544397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284562.

The product of its digits is 90720, while the sum is 38.

The square root of 6544397 is about 2558.2019075906. The cubic root of 6544397 is about 187.0494974161.

The spelling of 6544397 in words is "six million, five hundred forty-four thousand, three hundred ninety-seven".