63797021 has 2 divisors, whose sum is σ = 63797022. Its totient is φ = 63797020.

The previous prime is 63797017. The next prime is 63797029. The reversal of 63797021 is 12079736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59752900 + 4044121 = 7730^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 63797021 - 2² = 63797017 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 (63797029) 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, 31898510 + 31898511.

It is an arithmetic number, because the mean of its divisors is an integer number (31898511).

Almost surely, 2^63797021 is an apocalyptic number.

It is an amenable number.

63797021 is a deficient number, since it is larger than the sum of its proper divisors (1).

63797021 is an equidigital number, since it uses as much as digits as its factorization.

63797021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 63797021 is about 7987.3037378079. The cubic root of 63797021 is about 399.5766792402.

The spelling of 63797021 in words is "sixty-three million, seven hundred ninety-seven thousand, twenty-one".