63567997 has 2 divisors, whose sum is σ = 63567998. Its totient is φ = 63567996.

The previous prime is 63567979. The next prime is 63568003. The reversal of 63567997 is 79976536.

Together with previous prime (63567979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 12574116 = 7141^2 + 3546^2 .

It is a cyclic number.

It is not a de Polignac number, because 63567997 - 2⁷ = 63567869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63567937) 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, 31783998 + 31783999.

It is an arithmetic number, because the mean of its divisors is an integer number (31783999).

Almost surely, 2^63567997 is an apocalyptic number.

It is an amenable number.

63567997 is a deficient number, since it is larger than the sum of its proper divisors (1).

63567997 is an equidigital number, since it uses as much as digits as its factorization.

63567997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 52.

The square root of 63567997 is about 7972.9540949387. The cubic root of 63567997 is about 399.0979610936.

The spelling of 63567997 in words is "sixty-three million, five hundred sixty-seven thousand, nine hundred ninety-seven".