63235421 has 2 divisors, whose sum is σ = 63235422. Its totient is φ = 63235420.

The previous prime is 63235387. The next prime is 63235423. The reversal of 63235421 is 12453236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46104100 + 17131321 = 6790^2 + 4139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63235421 is a prime.

Together with 63235423, 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 (63235423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31617710 + 31617711.

It is an arithmetic number, because the mean of its divisors is an integer number (31617711).

Almost surely, 2^63235421 is an apocalyptic number.

It is an amenable number.

63235421 is a deficient number, since it is larger than the sum of its proper divisors (1).

63235421 is an equidigital number, since it uses as much as digits as its factorization.

63235421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 63235421 is about 7952.0702335933. The cubic root of 63235421 is about 398.4007415357.

Adding to 63235421 its reverse (12453236), we get a palindrome (75688657).

The spelling of 63235421 in words is "sixty-three million, two hundred thirty-five thousand, four hundred twenty-one".