63684461 has 2 divisors, whose sum is σ = 63684462. Its totient is φ = 63684460.

The previous prime is 63684451. The next prime is 63684479. The reversal of 63684461 is 16448636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41538025 + 22146436 = 6445^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 63684461 - 2¹⁰ = 63683437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63684421) 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, 31842230 + 31842231.

It is an arithmetic number, because the mean of its divisors is an integer number (31842231).

Almost surely, 2^63684461 is an apocalyptic number.

It is an amenable number.

63684461 is a deficient number, since it is larger than the sum of its proper divisors (1).

63684461 is an equidigital number, since it uses as much as digits as its factorization.

63684461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 38.

The square root of 63684461 is about 7980.2544445650. The cubic root of 63684461 is about 399.3415437666.

The spelling of 63684461 in words is "sixty-three million, six hundred eighty-four thousand, four hundred sixty-one".