834720563 has 2 divisors, whose sum is σ = 834720564. Its totient is φ = 834720562.

The previous prime is 834720547. The next prime is 834720631. The reversal of 834720563 is 365027438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 834720563 - 2⁴ = 834720547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (834720503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417360281 + 417360282.

It is an arithmetic number, because the mean of its divisors is an integer number (417360282).

Almost surely, 2^834720563 is an apocalyptic number.

834720563 is a deficient number, since it is larger than the sum of its proper divisors (1).

834720563 is an equidigital number, since it uses as much as digits as its factorization.

834720563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 834720563 is about 28891.5309909323. The cubic root of 834720563 is about 941.5579126377.

The spelling of 834720563 in words is "eight hundred thirty-four million, seven hundred twenty thousand, five hundred sixty-three".