63432121 has 2 divisors, whose sum is σ = 63432122. Its totient is φ = 63432120.

The previous prime is 63432119. The next prime is 63432133. The reversal of 63432121 is 12123436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62410000 + 1022121 = 7900^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 63432121 - 2¹ = 63432119 is a prime.

Together with 63432119, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 63432092 and 63432101.

It is not a weakly prime, because it can be changed into another prime (63432101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31716060 + 31716061.

It is an arithmetic number, because the mean of its divisors is an integer number (31716061).

Almost surely, 2^63432121 is an apocalyptic number.

It is an amenable number.

63432121 is a deficient number, since it is larger than the sum of its proper divisors (1).

63432121 is an equidigital number, since it uses as much as digits as its factorization.

63432121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 63432121 is about 7964.4284791817. The cubic root of 63432121 is about 398.8134021948.

Adding to 63432121 its reverse (12123436), we get a palindrome (75555557).

It can be divided in two parts, 6343 and 2121, that added together give a square (8464 = 92²).

The spelling of 63432121 in words is "sixty-three million, four hundred thirty-two thousand, one hundred twenty-one".