6493813 has 4 divisors (see below), whose sum is σ = 6875820. Its totient is φ = 6111808.

The previous prime is 6493793. The next prime is 6493819. The reversal of 6493813 is 3183946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3183946 = 2 ⋅1591973.

It can be written as a sum of positive squares in 2 ways, for example, as 2007889 + 4485924 = 1417^2 + 2118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6493813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6493819) 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, 190978 + ... + 191011.

It is an arithmetic number, because the mean of its divisors is an integer number (1718955).

Almost surely, 2^6493813 is an apocalyptic number.

It is an amenable number.

6493813 is a deficient number, since it is larger than the sum of its proper divisors (382007).

6493813 is a wasteful number, since it uses less digits than its factorization.

6493813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382006.

The product of its digits is 15552, while the sum is 34.

The square root of 6493813 is about 2548.2960973953. The cubic root of 6493813 is about 186.5663261039.

The spelling of 6493813 in words is "six million, four hundred ninety-three thousand, eight hundred thirteen".