9640863 has 20 divisors (see below), whose sum is σ = 14758128. Its totient is φ = 6268320.

The previous prime is 9640849. The next prime is 9640871. The reversal of 9640863 is 3680469.

9640863 is a `hidden beast` number, since 9 + 640 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 9640863 - 2¹⁴ = 9624479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640363) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1870 + ... + 4772.

Almost surely, 2^9640863 is an apocalyptic number.

9640863 is a deficient number, since it is larger than the sum of its proper divisors (5117265).

9640863 is a wasteful number, since it uses less digits than its factorization.

9640863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956 (or 2947 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 9640863 is about 3104.9739129339. The cubic root of 9640863 is about 212.8328384956.

The spelling of 9640863 in words is "nine million, six hundred forty thousand, eight hundred sixty-three".