63998433 has 12 divisors (see below), whose sum is σ = 92594320. Its totient is φ = 42595416.

The previous prime is 63998423. The next prime is 63998437. The reversal of 63998433 is 33489936.

63998433 is a `hidden beast` number, since 639 + 9 + 8 + 4 + 3 + 3 = 666.

It is not a de Polignac number, because 63998433 - 2⁸ = 63998177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63998437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258 + ... + 11316.

Almost surely, 2^63998433 is an apocalyptic number.

It is an amenable number.

63998433 is a deficient number, since it is larger than the sum of its proper divisors (28595887).

63998433 is a wasteful number, since it uses less digits than its factorization.

63998433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11708 (or 11705 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 63998433 is about 7999.9020619005. The cubic root of 63998433 is about 399.9967353900.

The spelling of 63998433 in words is "sixty-three million, nine hundred ninety-eight thousand, four hundred thirty-three".