6493409 has 4 divisors (see below), whose sum is σ = 6992916. Its totient is φ = 5993904.

The previous prime is 6493397. The next prime is 6493433. The reversal of 6493409 is 9043946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9043946 = 2 ⋅4521973.

It can be written as a sum of positive squares in 2 ways, for example, as 1203409 + 5290000 = 1097^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 6493409 - 2¹² = 6489313 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 (6493469) 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, 249734 + ... + 249759.

It is an arithmetic number, because the mean of its divisors is an integer number (1748229).

Almost surely, 2^6493409 is an apocalyptic number.

It is an amenable number.

6493409 is a deficient number, since it is larger than the sum of its proper divisors (499507).

6493409 is a wasteful number, since it uses less digits than its factorization.

6493409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499506.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 6493409 is about 2548.2168275090. The cubic root of 6493409 is about 186.5624570694.

The spelling of 6493409 in words is "six million, four hundred ninety-three thousand, four hundred nine".