563243591 has 4 divisors (see below), whose sum is σ = 565703400. Its totient is φ = 560783784.

The previous prime is 563243587. The next prime is 563243617. The reversal of 563243591 is 195342365.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 563243591 - 2² = 563243587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563243501) 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 in 3 ways as a sum of consecutive naturals, for example, 1229561 + ... + 1230018.

It is an arithmetic number, because the mean of its divisors is an integer number (141425850).

Almost surely, 2^563243591 is an apocalyptic number.

563243591 is a deficient number, since it is larger than the sum of its proper divisors (2459809).

563243591 is a wasteful number, since it uses less digits than its factorization.

563243591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459808.

The product of its digits is 97200, while the sum is 38.

The square root of 563243591 is about 23732.7535486298. The cubic root of 563243591 is about 825.8453977447.

The spelling of 563243591 in words is "five hundred sixty-three million, two hundred forty-three thousand, five hundred ninety-one".