9813965 has 24 divisors (see below), whose sum is σ = 14047992. Its totient is φ = 6558720.

The previous prime is 9813961. The next prime is 9813967. The reversal of 9813965 is 5693189.

It can be written as a sum of positive squares in 4 ways, for example, as 879844 + 8934121 = 938^2 + 2989^2 .

It is not a de Polignac number, because 9813965 - 2² = 9813961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9813961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9557 + ... + 10533.

It is an arithmetic number, because the mean of its divisors is an integer number (585333).

Almost surely, 2^9813965 is an apocalyptic number.

It is an amenable number.

9813965 is a deficient number, since it is larger than the sum of its proper divisors (4234027).

9813965 is a wasteful number, since it uses less digits than its factorization.

9813965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037 (or 1030 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 9813965 is about 3132.7248522652. The cubic root of 9813965 is about 214.0990966787.

The spelling of 9813965 in words is "nine million, eight hundred thirteen thousand, nine hundred sixty-five".