63937021 has 2 divisors, whose sum is σ = 63937022. Its totient is φ = 63937020.

The previous prime is 63936997. The next prime is 63937037. The reversal of 63937021 is 12073936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48024900 + 15912121 = 6930^2 + 3989^2 .

It is a cyclic number.

It is not a de Polignac number, because 63937021 - 2⁵ = 63936989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63937121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31968510 + 31968511.

It is an arithmetic number, because the mean of its divisors is an integer number (31968511).

Almost surely, 2^63937021 is an apocalyptic number.

It is an amenable number.

63937021 is a deficient number, since it is larger than the sum of its proper divisors (1).

63937021 is an equidigital number, since it uses as much as digits as its factorization.

63937021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 63937021 is about 7996.0628436750. The cubic root of 63937021 is about 399.8687506888.

The spelling of 63937021 in words is "sixty-three million, nine hundred thirty-seven thousand, twenty-one".