6381563 has 2 divisors, whose sum is σ = 6381564. Its totient is φ = 6381562.

The previous prime is 6381559. The next prime is 6381569. The reversal of 6381563 is 3651836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6381563 - 2² = 6381559 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6381569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3190781 + 3190782.

It is an arithmetic number, because the mean of its divisors is an integer number (3190782).

Almost surely, 2^6381563 is an apocalyptic number.

6381563 is a deficient number, since it is larger than the sum of its proper divisors (1).

6381563 is an equidigital number, since it uses as much as digits as its factorization.

6381563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 6381563 is about 2526.1755679287. The cubic root of 6381563 is about 185.4850965085.

The spelling of 6381563 in words is "six million, three hundred eighty-one thousand, five hundred sixty-three".