791563 has 2 divisors, whose sum is σ = 791564. Its totient is φ = 791562.

The previous prime is 791561. The next prime is 791569. The reversal of 791563 is 365197.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 791563 - 2¹ = 791561 is a prime.

Together with 791561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (791561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395781 + 395782.

It is an arithmetic number, because the mean of its divisors is an integer number (395782).

2⁷⁹¹⁵⁶³ is an apocalyptic number.

791563 is a deficient number, since it is larger than the sum of its proper divisors (1).

791563 is an equidigital number, since it uses as much as digits as its factorization.

791563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 31.

The square root of 791563 is about 889.6982634579. The cubic root of 791563 is about 92.5042802986.

The spelling of 791563 in words is "seven hundred ninety-one thousand, five hundred sixty-three".