63632021 has 2 divisors, whose sum is σ = 63632022. Its totient is φ = 63632020.

The previous prime is 63631999. The next prime is 63632029. The reversal of 63632021 is 12023636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60621796 + 3010225 = 7786^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 63632021 - 2⁶ = 63631957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63632029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31816010 + 31816011.

It is an arithmetic number, because the mean of its divisors is an integer number (31816011).

Almost surely, 2^63632021 is an apocalyptic number.

It is an amenable number.

63632021 is a deficient number, since it is larger than the sum of its proper divisors (1).

63632021 is an equidigital number, since it uses as much as digits as its factorization.

63632021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 63632021 is about 7976.9681583920. The cubic root of 63632021 is about 399.2319030953.

Adding to 63632021 its reverse (12023636), we get a palindrome (75655657).

The spelling of 63632021 in words is "sixty-three million, six hundred thirty-two thousand, twenty-one".