9663947 has 4 divisors (see below), whose sum is σ = 9672696. Its totient is φ = 9655200.

The previous prime is 9663937. The next prime is 9663961. The reversal of 9663947 is 7493669.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7493669 = 73 ⋅102653.

It is a cyclic number.

It is not a de Polignac number, because 9663947 - 2¹² = 9659851 is a prime.

It is a Duffinian number.

Its product of digits (244944) is a multiple of the sum of its prime divisors (8748).

It is a junction number, because it is equal to n+sod(n) for n = 9663898 and 9663907.

It is not an unprimeable number, because it can be changed into a prime (9663917) 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, 2429 + ... + 5022.

It is an arithmetic number, because the mean of its divisors is an integer number (2418174).

Almost surely, 2^9663947 is an apocalyptic number.

9663947 is a deficient number, since it is larger than the sum of its proper divisors (8749).

9663947 is a wasteful number, since it uses less digits than its factorization.

9663947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748.

The product of its digits is 244944, while the sum is 44.

The square root of 9663947 is about 3108.6889519539. The cubic root of 9663947 is about 213.0025714752.

It can be divided in two parts, 966 and 3947, that added together give a cube (4913 = 17³).

The spelling of 9663947 in words is "nine million, six hundred sixty-three thousand, nine hundred forty-seven".