9213661 has 8 divisors (see below), whose sum is σ = 9381240. Its totient is φ = 9047808.

The previous prime is 9213647. The next prime is 9213683. The reversal of 9213661 is 1663129.

It can be written as a sum of positive squares in 4 ways, for example, as 481636 + 8732025 = 694^2 + 2955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9213661 - 2²¹ = 7116509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9213601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14625 + ... + 15241.

It is an arithmetic number, because the mean of its divisors is an integer number (1172655).

Almost surely, 2^9213661 is an apocalyptic number.

It is an amenable number.

9213661 is a deficient number, since it is larger than the sum of its proper divisors (167579).

9213661 is a wasteful number, since it uses less digits than its factorization.

9213661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 1944, while the sum is 28.

The square root of 9213661 is about 3035.4012914275. The cubic root of 9213661 is about 209.6415730159.

The spelling of 9213661 in words is "nine million, two hundred thirteen thousand, six hundred sixty-one".