9665849 has 4 divisors (see below), whose sum is σ = 9672960. Its totient is φ = 9658740.

The previous prime is 9665837. The next prime is 9665863. The reversal of 9665849 is 9485669.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9485669 = 151 ⋅62819.

It is a cyclic number.

It is not a de Polignac number, because 9665849 - 2⁴ = 9665833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9665449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809 + ... + 4470.

It is an arithmetic number, because the mean of its divisors is an integer number (2418240).

Almost surely, 2^9665849 is an apocalyptic number.

It is an amenable number.

9665849 is a deficient number, since it is larger than the sum of its proper divisors (7111).

9665849 is a wasteful number, since it uses less digits than its factorization.

9665849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110.

The product of its digits is 466560, while the sum is 47.

The square root of 9665849 is about 3108.9948536464. The cubic root of 9665849 is about 213.0165445208.

The spelling of 9665849 in words is "nine million, six hundred sixty-five thousand, eight hundred forty-nine".