561630463 has 2 divisors, whose sum is σ = 561630464. Its totient is φ = 561630462.

The previous prime is 561630409. The next prime is 561630467. The reversal of 561630463 is 364036165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561630463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561630467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280815231 + 280815232.

It is an arithmetic number, because the mean of its divisors is an integer number (280815232).

Almost surely, 2^561630463 is an apocalyptic number.

561630463 is a deficient number, since it is larger than the sum of its proper divisors (1).

561630463 is an equidigital number, since it uses as much as digits as its factorization.

561630463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 561630463 is about 23698.7439118617. The cubic root of 561630463 is about 825.0562376111.

The spelling of 561630463 in words is "five hundred sixty-one million, six hundred thirty thousand, four hundred sixty-three".