1171217563 has 2 divisors, whose sum is σ = 1171217564. Its totient is φ = 1171217562.

The previous prime is 1171217561. The next prime is 1171217639. The reversal of 1171217563 is 3657121711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3657121711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1171217563 - 2¹ = 1171217561 is a prime.

Together with 1171217561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1171217561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585608781 + 585608782.

It is an arithmetic number, because the mean of its divisors is an integer number (585608782).

Almost surely, 2^1171217563 is an apocalyptic number.

1171217563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171217563 is an equidigital number, since it uses as much as digits as its factorization.

1171217563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 34.

The square root of 1171217563 is about 34223.0560149149. The cubic root of 1171217563 is about 1054.0936378252.

The spelling of 1171217563 in words is "one billion, one hundred seventy-one million, two hundred seventeen thousand, five hundred sixty-three".