9636921 has 16 divisors (see below), whose sum is σ = 16316800. Its totient is φ = 5506704.

The previous prime is 9636917. The next prime is 9636941. The reversal of 9636921 is 1296369.

It is not a de Polignac number, because 9636921 - 2² = 9636917 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9636941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25306 + ... + 25683.

It is an arithmetic number, because the mean of its divisors is an integer number (1019800).

Almost surely, 2^9636921 is an apocalyptic number.

It is an amenable number.

9636921 is a deficient number, since it is larger than the sum of its proper divisors (6679879).

9636921 is a wasteful number, since it uses less digits than its factorization.

9636921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51005 (or 50999 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 9636921 is about 3104.3390600899. The cubic root of 9636921 is about 212.8038265207.

The spelling of 9636921 in words is "nine million, six hundred thirty-six thousand, nine hundred twenty-one".