6558493 has 2 divisors, whose sum is σ = 6558494. Its totient is φ = 6558492.

The previous prime is 6558491. The next prime is 6558511. The reversal of 6558493 is 3948556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6543364 + 15129 = 2558^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 6558493 - 2¹ = 6558491 is a prime.

Together with 6558491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6558491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3279246 + 3279247.

It is an arithmetic number, because the mean of its divisors is an integer number (3279247).

Almost surely, 2^6558493 is an apocalyptic number.

It is an amenable number.

6558493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6558493 is an equidigital number, since it uses as much as digits as its factorization.

6558493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 6558493 is about 2560.9554857514. The cubic root of 6558493 is about 187.1836966376.

The spelling of 6558493 in words is "six million, five hundred fifty-eight thousand, four hundred ninety-three".