9216385 has 4 divisors (see below), whose sum is σ = 11059668. Its totient is φ = 7373104.

The previous prime is 9216373. The next prime is 9216391. The reversal of 9216385 is 5836129.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5022081 + 4194304 = 2241^2 + 2048^2 .

It is a cyclic number.

It is not a de Polignac number, because 9216385 - 2⁷ = 9216257 is a prime.

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

It is a Duffinian number.

9216385 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9216385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921634 + ... + 921643.

It is an arithmetic number, because the mean of its divisors is an integer number (2764917).

Almost surely, 2^9216385 is an apocalyptic number.

It is an amenable number.

9216385 is a deficient number, since it is larger than the sum of its proper divisors (1843283).

9216385 is a wasteful number, since it uses less digits than its factorization.

9216385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843282.

The product of its digits is 12960, while the sum is 34.

The square root of 9216385 is about 3035.8499633546. The cubic root of 9216385 is about 209.6622310141.

The spelling of 9216385 in words is "nine million, two hundred sixteen thousand, three hundred eighty-five".