64947 has 4 divisors (see below), whose sum is σ = 86600.
Its totient is φ = 43296.
The previous prime is 64937. The next prime is 64951. The reversal of 64947 is 74946.
Subtracting 64947 from its reverse (74946), we obtain a palindrome (9999).
It can be divided in two parts, 649 and 47, that multiplied together give a palindrome (30503).
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 64947 - 214 = 48563 is a prime.
It is a super-2 number, since 2×649472 = 8436225618, which contains 22 as substring.
It is a D-number.
It is a Duffinian number.
It is a nialpdrome in base 16.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64947.
It is not an unprimeable number, because it can be changed into a prime (64927) 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, 10822 + ... + 10827.
It is an arithmetic number, because the mean of its divisors is an integer number (21650).
264947 is an apocalyptic number.
64947 is a deficient number, since it is larger than the sum of its proper divisors (21653).
64947 is a wasteful number, since it uses less digits than its factorization.
64947 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 21652.
The product of its digits is 6048, while the sum is 30.
The square root of 64947 is about 254.8470129313.
The cubic root of 64947 is about 40.1963264879.
The spelling of 64947 in words is "sixty-four thousand, nine hundred forty-seven".