63983965 has 8 divisors (see below), whose sum is σ = 76838328. Its totient is φ = 51148800.

The previous prime is 63983951. The next prime is 63984007. The reversal of 63983965 is 56938936.

63983965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11985444 + 51998521 = 3462^2 + 7211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63983965 - 2⁷ = 63983837 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 4009 + ... + 12001.

It is an arithmetic number, because the mean of its divisors is an integer number (9604791).

Almost surely, 2^63983965 is an apocalyptic number.

It is an amenable number.

63983965 is a deficient number, since it is larger than the sum of its proper divisors (12854363).

63983965 is a wasteful number, since it uses less digits than its factorization.

63983965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9599.

The product of its digits is 1049760, while the sum is 49.

The square root of 63983965 is about 7998.9977497184. The cubic root of 63983965 is about 399.9665909597.

The spelling of 63983965 in words is "sixty-three million, nine hundred eighty-three thousand, nine hundred sixty-five".