63947 has 4 divisors (see below), whose sum is σ = 68880. Its totient is φ = 59016.

The previous prime is 63929. The next prime is 63949. The reversal of 63947 is 74936.

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 63947 - 2⁸ = 63691 is a prime.

It is a d-powerful number, because it can be written as 6³ + 3⁵ + 9⁵ + 4⁶ + 7³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447 + ... + 2472.

It is an arithmetic number, because the mean of its divisors is an integer number (17220).

2⁶³⁹⁴⁷ is an apocalyptic number.

63947 is a deficient number, since it is larger than the sum of its proper divisors (4933).

63947 is a wasteful number, since it uses less digits than its factorization.

63947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932.

The product of its digits is 4536, while the sum is 29.

The square root of 63947 is about 252.8774406704. The cubic root of 63947 is about 39.9889552840.

It can be divided in two parts, 639 and 47, that added together give a palindrome (686).

The spelling of 63947 in words is "sixty-three thousand, nine hundred forty-seven".