6541687 has 2 divisors, whose sum is σ = 6541688. Its totient is φ = 6541686.

The previous prime is 6541663. The next prime is 6541693. The reversal of 6541687 is 7861456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6541687 - 2¹⁹ = 6017399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6541487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270843 + 3270844.

It is an arithmetic number, because the mean of its divisors is an integer number (3270844).

Almost surely, 2^6541687 is an apocalyptic number.

6541687 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541687 is an equidigital number, since it uses as much as digits as its factorization.

6541687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 6541687 is about 2557.6721838422. The cubic root of 6541687 is about 187.0236751174.

The spelling of 6541687 in words is "six million, five hundred forty-one thousand, six hundred eighty-seven".