563651989 has 2 divisors, whose sum is σ = 563651990. Its totient is φ = 563651988.

The previous prime is 563651987. The next prime is 563652029. The reversal of 563651989 is 989156365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493595089 + 70056900 = 22217^2 + 8370^2 .

It is a cyclic number.

It is not a de Polignac number, because 563651989 - 2¹ = 563651987 is a prime.

It is a super-2 number, since 2×563651989² = 635407129407312242, which contains 22 as substring.

Together with 563651987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563651987) 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 as a sum of consecutive naturals, namely, 281825994 + 281825995.

It is an arithmetic number, because the mean of its divisors is an integer number (281825995).

Almost surely, 2^563651989 is an apocalyptic number.

It is an amenable number.

563651989 is a deficient number, since it is larger than the sum of its proper divisors (1).

563651989 is an equidigital number, since it uses as much as digits as its factorization.

563651989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 52.

The square root of 563651989 is about 23741.3560901647. The cubic root of 563651989 is about 826.0449515019.

The spelling of 563651989 in words is "five hundred sixty-three million, six hundred fifty-one thousand, nine hundred eighty-nine".