63438217 has 2 divisors, whose sum is σ = 63438218. Its totient is φ = 63438216.

The previous prime is 63438187. The next prime is 63438227. The reversal of 63438217 is 71283436.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35390601 + 28047616 = 5949^2 + 5296^2 .

It is a cyclic number.

It is not a de Polignac number, because 63438217 - 2¹¹ = 63436169 is a prime.

It is a super-2 number, since 2×63438217² = 8048814752278178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63438227) 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, 31719108 + 31719109.

It is an arithmetic number, because the mean of its divisors is an integer number (31719109).

Almost surely, 2^63438217 is an apocalyptic number.

It is an amenable number.

63438217 is a deficient number, since it is larger than the sum of its proper divisors (1).

63438217 is an equidigital number, since it uses as much as digits as its factorization.

63438217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 63438217 is about 7964.8111716474. The cubic root of 63438217 is about 398.8261774712.

The spelling of 63438217 in words is "sixty-three million, four hundred thirty-eight thousand, two hundred seventeen".