6487643 has 2 divisors, whose sum is σ = 6487644. Its totient is φ = 6487642.

The previous prime is 6487577. The next prime is 6487667. The reversal of 6487643 is 3467846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6487643 - 2¹⁴ = 6471259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6487597 and 6487606.

It is not a weakly prime, because it can be changed into another prime (6483643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243821 + 3243822.

It is an arithmetic number, because the mean of its divisors is an integer number (3243822).

Almost surely, 2^6487643 is an apocalyptic number.

6487643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6487643 is an equidigital number, since it uses as much as digits as its factorization.

6487643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 6487643 is about 2547.0851968476. The cubic root of 6487643 is about 186.5072196387.

The spelling of 6487643 in words is "six million, four hundred eighty-seven thousand, six hundred forty-three".