1563132817 has 2 divisors, whose sum is σ = 1563132818. Its totient is φ = 1563132816.

The previous prime is 1563132803. The next prime is 1563132827. The reversal of 1563132817 is 7182313651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1527324561 + 35808256 = 39081^2 + 5984^2 .

It is an emirp because it is prime and its reverse (7182313651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1563132817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1563132827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781566408 + 781566409.

It is an arithmetic number, because the mean of its divisors is an integer number (781566409).

Almost surely, 2^1563132817 is an apocalyptic number.

It is an amenable number.

1563132817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563132817 is an equidigital number, since it uses as much as digits as its factorization.

1563132817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 1563132817 is about 39536.4745140484. The cubic root of 1563132817 is about 1160.5538419965.

The spelling of 1563132817 in words is "one billion, five hundred sixty-three million, one hundred thirty-two thousand, eight hundred seventeen".