6493609 has 4 divisors (see below), whose sum is σ = 6875604. Its totient is φ = 6111616.

The previous prime is 6493607. The next prime is 6493631. The reversal of 6493609 is 9063946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9063946 = 2 ⋅4531973.

It can be written as a sum of positive squares in 2 ways, for example, as 5221225 + 1272384 = 2285^2 + 1128^2 .

It is a cyclic number.

It is not a de Polignac number, because 6493609 - 2¹ = 6493607 is a prime.

It is a Duffinian number.

6493609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6493603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190972 + ... + 191005.

It is an arithmetic number, because the mean of its divisors is an integer number (1718901).

Almost surely, 2^6493609 is an apocalyptic number.

It is an amenable number.

6493609 is a deficient number, since it is larger than the sum of its proper divisors (381995).

6493609 is a wasteful number, since it uses less digits than its factorization.

6493609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381994.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 6493609 is about 2548.2560703352. The cubic root of 6493609 is about 186.5643724531.

The spelling of 6493609 in words is "six million, four hundred ninety-three thousand, six hundred nine".