63997308 has 18 divisors (see below), whose sum is σ = 161771064. Its totient is φ = 21332424.

The previous prime is 63997289. The next prime is 63997343. The reversal of 63997308 is 80379936.

It is a happy number.

63997308 is a `hidden beast` number, since 639 + 9 + 7 + 3 + 0 + 8 = 666.

63997308 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 (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 888816 + ... + 888887.

Almost surely, 2^63997308 is an apocalyptic number.

It is an amenable number.

63997308 is an abundant number, since it is smaller than the sum of its proper divisors (97773756).

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

63997308 is a wasteful number, since it uses less digits than its factorization.

63997308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777713 (or 1777708 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 63997308 is about 7999.8317482307. The cubic root of 63997308 is about 399.9943915880.

The spelling of 63997308 in words is "sixty-three million, nine hundred ninety-seven thousand, three hundred eight".