63228913 has 6 divisors (see below), whose sum is σ = 69499682. Its totient is φ = 57480720.

The previous prime is 63228883. The next prime is 63228917. The reversal of 63228913 is 31982236.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62204769 + 1024144 = 7887^2 + 1012^2 .

It is a de Polignac number, because none of the positive numbers 2^k-63228913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63228917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261156 + ... + 261397.

Almost surely, 2^63228913 is an apocalyptic number.

It is an amenable number.

63228913 is a deficient number, since it is larger than the sum of its proper divisors (6270769).

63228913 is a wasteful number, since it uses less digits than its factorization.

63228913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522575 (or 522564 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 63228913 is about 7951.6610214470. The cubic root of 63228913 is about 398.3870736634.

The spelling of 63228913 in words is "sixty-three million, two hundred twenty-eight thousand, nine hundred thirteen".