63345421 has 2 divisors, whose sum is σ = 63345422. Its totient is φ = 63345420.

The previous prime is 63345397. The next prime is 63345433. The reversal of 63345421 is 12454336.

63345421 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., 62631396 + 714025 = 7914^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 63345421 - 2⁹ = 63344909 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63345421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63345521) 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, 31672710 + 31672711.

It is an arithmetic number, because the mean of its divisors is an integer number (31672711).

Almost surely, 2^63345421 is an apocalyptic number.

It is an amenable number.

63345421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63345421 is an equidigital number, since it uses as much as digits as its factorization.

63345421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 63345421 is about 7958.9836662730. The cubic root of 63345421 is about 398.6316179142.

Adding to 63345421 its reverse (12454336), we get a palindrome (75799757).

The spelling of 63345421 in words is "sixty-three million, three hundred forty-five thousand, four hundred twenty-one".