6531493 has 4 divisors (see below), whose sum is σ = 6544108. Its totient is φ = 6518880.

The previous prime is 6531491. The next prime is 6531509. The reversal of 6531493 is 3941356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1046529 + 5484964 = 1023^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 6531493 - 2¹ = 6531491 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 5⁵ + 3 + 1 + 4⁸ + 9⁷ + 3⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6531491) 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, 5496 + ... + 6577.

It is an arithmetic number, because the mean of its divisors is an integer number (1636027).

Almost surely, 2^6531493 is an apocalyptic number.

It is an amenable number.

6531493 is a deficient number, since it is larger than the sum of its proper divisors (12615).

6531493 is a wasteful number, since it uses less digits than its factorization.

6531493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12614.

The product of its digits is 9720, while the sum is 31.

The square root of 6531493 is about 2555.6785791644. The cubic root of 6531493 is about 186.9264774312.

The spelling of 6531493 in words is "six million, five hundred thirty-one thousand, four hundred ninety-three".