63243421 has 2 divisors, whose sum is σ = 63243422. Its totient is φ = 63243420.

The previous prime is 63243413. The next prime is 63243431. The reversal of 63243421 is 12434236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42640900 + 20602521 = 6530^2 + 4539^2 .

It is a cyclic number.

It is not a de Polignac number, because 63243421 - 2³ = 63243413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63243431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31621710 + 31621711.

It is an arithmetic number, because the mean of its divisors is an integer number (31621711).

Almost surely, 2^63243421 is an apocalyptic number.

It is an amenable number.

63243421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63243421 is an equidigital number, since it uses as much as digits as its factorization.

63243421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 25.

The square root of 63243421 is about 7952.5732313510. The cubic root of 63243421 is about 398.4175415690.

Adding to 63243421 its reverse (12434236), we get a palindrome (75677657).

The spelling of 63243421 in words is "sixty-three million, two hundred forty-three thousand, four hundred twenty-one".