63984367 has 4 divisors (see below), whose sum is σ = 66766320. Its totient is φ = 61202416.

The previous prime is 63984337. The next prime is 63984373. The reversal of 63984367 is 76348936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63984367 - 2¹⁵ = 63951599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63984307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390942 + ... + 1390987.

It is an arithmetic number, because the mean of its divisors is an integer number (16691580).

Almost surely, 2^63984367 is an apocalyptic number.

63984367 is a deficient number, since it is larger than the sum of its proper divisors (2781953).

63984367 is a wasteful number, since it uses less digits than its factorization.

63984367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781952.

The product of its digits is 653184, while the sum is 46.

The square root of 63984367 is about 7999.0228778270. The cubic root of 63984367 is about 399.9674285978.

The spelling of 63984367 in words is "sixty-three million, nine hundred eighty-four thousand, three hundred sixty-seven".