563899421 has 2 divisors, whose sum is σ = 563899422. Its totient is φ = 563899420.

The previous prime is 563899411. The next prime is 563899429. The reversal of 563899421 is 124998365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383964025 + 179935396 = 19595^2 + 13414^2 .

It is a cyclic number.

It is not a de Polignac number, because 563899421 - 2²² = 559705117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_29535779 and since 563899421 and 29535779 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (563899429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281949710 + 281949711.

It is an arithmetic number, because the mean of its divisors is an integer number (281949711).

Almost surely, 2^563899421 is an apocalyptic number.

It is an amenable number.

563899421 is a deficient number, since it is larger than the sum of its proper divisors (1).

563899421 is an equidigital number, since it uses as much as digits as its factorization.

563899421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 563899421 is about 23746.5665097083. The cubic root of 563899421 is about 826.1658062480.

The spelling of 563899421 in words is "five hundred sixty-three million, eight hundred ninety-nine thousand, four hundred twenty-one".