63172217 has 2 divisors, whose sum is σ = 63172218. Its totient is φ = 63172216.

The previous prime is 63172199. The next prime is 63172253. The reversal of 63172217 is 71227136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36711481 + 26460736 = 6059^2 + 5144^2 .

It is a cyclic number.

It is not a de Polignac number, because 63172217 - 2¹² = 63168121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63172217.

It is not a weakly prime, because it can be changed into another prime (63172297) 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, 31586108 + 31586109.

It is an arithmetic number, because the mean of its divisors is an integer number (31586109).

Almost surely, 2^63172217 is an apocalyptic number.

It is an amenable number.

63172217 is a deficient number, since it is larger than the sum of its proper divisors (1).

63172217 is an equidigital number, since it uses as much as digits as its factorization.

63172217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 63172217 is about 7948.0951806077. The cubic root of 63172217 is about 398.2679630282.

The spelling of 63172217 in words is "sixty-three million, one hundred seventy-two thousand, two hundred seventeen".