63391308 has 12 divisors (see below), whose sum is σ = 147913080. Its totient is φ = 21130432.

The previous prime is 63391267. The next prime is 63391309. The reversal of 63391308 is 80319336.

63391308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (63391309) 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 in 3 ways as a sum of consecutive naturals, for example, 2641293 + ... + 2641316.

It is an arithmetic number, because the mean of its divisors is an integer number (12326090).

Almost surely, 2^63391308 is an apocalyptic number.

It is an amenable number.

63391308 is an abundant number, since it is smaller than the sum of its proper divisors (84521772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63391308 is a wasteful number, since it uses less digits than its factorization.

63391308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282616 (or 5282614 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 63391308 is about 7961.8658617186. The cubic root of 63391308 is about 398.7278500421.

The spelling of 63391308 in words is "sixty-three million, three hundred ninety-one thousand, three hundred eight".