6539647 has 2 divisors, whose sum is σ = 6539648. Its totient is φ = 6539646.

The previous prime is 6539593. The next prime is 6539671. The reversal of 6539647 is 7469356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6539647 - 2¹¹ = 6537599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6539347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269823 + 3269824.

It is an arithmetic number, because the mean of its divisors is an integer number (3269824).

Almost surely, 2^6539647 is an apocalyptic number.

6539647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6539647 is an equidigital number, since it uses as much as digits as its factorization.

6539647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 6539647 is about 2557.2733526160. The cubic root of 6539647 is about 187.0042322243.

The spelling of 6539647 in words is "six million, five hundred thirty-nine thousand, six hundred forty-seven".