63944947 has 8 divisors (see below), whose sum is σ = 70145712. Its totient is φ = 57808800.

The previous prime is 63944929. The next prime is 63944963. The reversal of 63944947 is 74944936.

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

It is a cyclic number.

It is not a de Polignac number, because 63944947 - 2¹⁵ = 63912179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63944897 and 63944906.

It is not an unprimeable number, because it can be changed into a prime (63944147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14068 + ... + 18049.

It is an arithmetic number, because the mean of its divisors is an integer number (8768214).

Almost surely, 2^63944947 is an apocalyptic number.

63944947 is a deficient number, since it is larger than the sum of its proper divisors (6200765).

63944947 is a wasteful number, since it uses less digits than its factorization.

63944947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32309.

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

The square root of 63944947 is about 7996.5584472322. The cubic root of 63944947 is about 399.8852733476.

The spelling of 63944947 in words is "sixty-three million, nine hundred forty-four thousand, nine hundred forty-seven".