65947 has 4 divisors (see below), whose sum is σ = 75376. Its totient is φ = 56520.

The previous prime is 65929. The next prime is 65951. The reversal of 65947 is 74956.

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 65947 - 2¹⁵ = 33179 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (65927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4704 + ... + 4717.

It is an arithmetic number, because the mean of its divisors is an integer number (18844).

2⁶⁵⁹⁴⁷ is an apocalyptic number.

65947 is a deficient number, since it is larger than the sum of its proper divisors (9429).

65947 is an equidigital number, since it uses as much as digits as its factorization.

65947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428.

The product of its digits is 7560, while the sum is 31.

The square root of 65947 is about 256.8014797465. The cubic root of 65947 is about 40.4015798487.

Subtracting 65947 from its reverse (74956), we obtain a palindrome (9009).

The spelling of 65947 in words is "sixty-five thousand, nine hundred forty-seven".