6538493 has 4 divisors (see below), whose sum is σ = 7041468. Its totient is φ = 6035520.

The previous prime is 6538487. The next prime is 6538507. The reversal of 6538493 is 3948356.

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 521284 + 6017209 = 722^2 + 2453^2 .

It is a cyclic number.

It is not a de Polignac number, because 6538493 - 2⁶ = 6538429 is a prime.

It is a super-2 number, since 2×6538493² = 85503781422098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6538403) 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, 251468 + ... + 251493.

It is an arithmetic number, because the mean of its divisors is an integer number (1760367).

Almost surely, 2^6538493 is an apocalyptic number.

It is an amenable number.

6538493 is a deficient number, since it is larger than the sum of its proper divisors (502975).

6538493 is a wasteful number, since it uses less digits than its factorization.

6538493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502974.

The product of its digits is 77760, while the sum is 38.

The square root of 6538493 is about 2557.0477117176. The cubic root of 6538493 is about 186.9932318559.

The spelling of 6538493 in words is "six million, five hundred thirty-eight thousand, four hundred ninety-three".