63982421 has 2 divisors, whose sum is σ = 63982422. Its totient is φ = 63982420.

The previous prime is 63982403. The next prime is 63982423. The reversal of 63982421 is 12428936.

63982421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48094225 + 15888196 = 6935^2 + 3986^2 .

It is a cyclic number.

It is not a de Polignac number, because 63982421 - 2¹⁰ = 63981397 is a prime.

Together with 63982423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63982423) 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, 31991210 + 31991211.

It is an arithmetic number, because the mean of its divisors is an integer number (31991211).

Almost surely, 2^63982421 is an apocalyptic number.

It is an amenable number.

63982421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63982421 is an equidigital number, since it uses as much as digits as its factorization.

63982421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 63982421 is about 7998.9012370450. The cubic root of 63982421 is about 399.9633737297.

The spelling of 63982421 in words is "sixty-three million, nine hundred eighty-two thousand, four hundred twenty-one".