1641563683 has 2 divisors, whose sum is σ = 1641563684. Its totient is φ = 1641563682.

The previous prime is 1641563597. The next prime is 1641563687. The reversal of 1641563683 is 3863651461.

It is a strong prime.

It is an emirp because it is prime and its reverse (3863651461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1641563683 - 2⁹ = 1641563171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641563687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820781841 + 820781842.

It is an arithmetic number, because the mean of its divisors is an integer number (820781842).

Almost surely, 2^1641563683 is an apocalyptic number.

1641563683 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641563683 is an equidigital number, since it uses as much as digits as its factorization.

1641563683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 1641563683 is about 40516.2150626141. The cubic root of 1641563683 is about 1179.6483877691.

The spelling of 1641563683 in words is "one billion, six hundred forty-one million, five hundred sixty-three thousand, six hundred eighty-three".