63218873 has 2 divisors, whose sum is σ = 63218874. Its totient is φ = 63218872.

The previous prime is 63218861. The next prime is 63218893. The reversal of 63218873 is 37881236.

It is a happy number.

63218873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34199104 + 29019769 = 5848^2 + 5387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63218873 is a prime.

It is not a weakly prime, because it can be changed into another prime (63218893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31609436 + 31609437.

It is an arithmetic number, because the mean of its divisors is an integer number (31609437).

Almost surely, 2^63218873 is an apocalyptic number.

It is an amenable number.

63218873 is a deficient number, since it is larger than the sum of its proper divisors (1).

63218873 is an equidigital number, since it uses as much as digits as its factorization.

63218873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 63218873 is about 7951.0296817456. The cubic root of 63218873 is about 398.3659861695.

The spelling of 63218873 in words is "sixty-three million, two hundred eighteen thousand, eight hundred seventy-three".