9931864 has 8 divisors (see below), whose sum is σ = 18622260. Its totient is φ = 4965928.

The previous prime is 9931861. The next prime is 9931897. The reversal of 9931864 is 4681399.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9931861) 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 as a sum of consecutive naturals, namely, 620734 + ... + 620749.

Almost surely, 2^9931864 is an apocalyptic number.

It is an amenable number.

9931864 is a deficient number, since it is larger than the sum of its proper divisors (8690396).

9931864 is a wasteful number, since it uses less digits than its factorization.

9931864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241489 (or 1241485 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 9931864 is about 3151.4859986997. The cubic root of 9931864 is about 214.9530382377.

The spelling of 9931864 in words is "nine million, nine hundred thirty-one thousand, eight hundred sixty-four".