6549993 has 6 divisors (see below), whose sum is σ = 9461114. Its totient is φ = 4366656.

The previous prime is 6549979. The next prime is 6550001. The reversal of 6549993 is 3999456.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4678569 + 1871424 = 2163^2 + 1368^2 .

It is not a de Polignac number, because 6549993 - 2¹² = 6545897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6549923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363880 + ... + 363897.

Almost surely, 2^6549993 is an apocalyptic number.

It is an amenable number.

6549993 is a deficient number, since it is larger than the sum of its proper divisors (2911121).

6549993 is a wasteful number, since it uses less digits than its factorization.

6549993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727783 (or 727780 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 6549993 is about 2559.2954108504. The cubic root of 6549993 is about 187.1027964841.

The spelling of 6549993 in words is "six million, five hundred forty-nine thousand, nine hundred ninety-three".