9965841 has 4 divisors (see below), whose sum is σ = 13287792. Its totient is φ = 6643892.

The previous prime is 9965819. The next prime is 9965843. The reversal of 9965841 is 1485699.

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.

It is a cyclic number.

It is not a de Polignac number, because 9965841 - 2⁶ = 9965777 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 9965793 and 9965802.

It is not an unprimeable number, because it can be changed into a prime (9965843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660971 + ... + 1660976.

It is an arithmetic number, because the mean of its divisors is an integer number (3321948).

Almost surely, 2^9965841 is an apocalyptic number.

It is an amenable number.

9965841 is a deficient number, since it is larger than the sum of its proper divisors (3321951).

9965841 is a wasteful number, since it uses less digits than its factorization.

9965841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321950.

The product of its digits is 77760, while the sum is 42.

The square root of 9965841 is about 3156.8720278149. The cubic root of 9965841 is about 215.1978780372.

It can be divided in two parts, 99658 and 41, that added together give a palindrome (99699).

The spelling of 9965841 in words is "nine million, nine hundred sixty-five thousand, eight hundred forty-one".