63994447 has 16 divisors (see below), whose sum is σ = 73165824. Its totient is φ = 55440000.

The previous prime is 63994433. The next prime is 63994517. The reversal of 63994447 is 74449936.

It is not a de Polignac number, because 63994447 - 2¹⁹ = 63470159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63994397 and 63994406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63994247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21447 + ... + 24247.

It is an arithmetic number, because the mean of its divisors is an integer number (4572864).

Almost surely, 2^63994447 is an apocalyptic number.

63994447 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

63994447 is a deficient number, since it is larger than the sum of its proper divisors (9171377).

63994447 is a wasteful number, since it uses less digits than its factorization.

63994447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910.

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

The square root of 63994447 is about 7999.6529299714. The cubic root of 63994447 is about 399.9884309154.

The spelling of 63994447 in words is "sixty-three million, nine hundred ninety-four thousand, four hundred forty-seven".