9813661 has 12 divisors (see below), whose sum is σ = 11594880. Its totient is φ = 8233680.

The previous prime is 9813659. The next prime is 9813677. The reversal of 9813661 is 1663189.

9813661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9813661 - 2¹ = 9813659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9813611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 781 + ... + 4498.

It is an arithmetic number, because the mean of its divisors is an integer number (966240).

Almost surely, 2^9813661 is an apocalyptic number.

It is an amenable number.

9813661 is a deficient number, since it is larger than the sum of its proper divisors (1781219).

9813661 is a wasteful number, since it uses less digits than its factorization.

9813661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316 (or 5303 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 9813661 is about 3132.6763318287. The cubic root of 9813661 is about 214.0968859923.

The spelling of 9813661 in words is "nine million, eight hundred thirteen thousand, six hundred sixty-one".