63021421 has 2 divisors, whose sum is σ = 63021422. Its totient is φ = 63021420.

The previous prime is 63021377. The next prime is 63021433. The reversal of 63021421 is 12412036.

63021421 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., 59505796 + 3515625 = 7714^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 63021421 - 2²³ = 54632813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63021521) 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, 31510710 + 31510711.

It is an arithmetic number, because the mean of its divisors is an integer number (31510711).

Almost surely, 2^63021421 is an apocalyptic number.

It is an amenable number.

63021421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63021421 is an equidigital number, since it uses as much as digits as its factorization.

63021421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 63021421 is about 7938.6032146720. The cubic root of 63021421 is about 397.9508137663.

Adding to 63021421 its reverse (12412036), we get a palindrome (75433457).

The spelling of 63021421 in words is "sixty-three million, twenty-one thousand, four hundred twenty-one".