9805849013 has 4 divisors (see below), whose sum is σ = 9806606688. Its totient is φ = 9805091340.

The previous prime is 9805848973. The next prime is 9805849093. The reversal of 9805849013 is 3109485089.

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 an emirpimes, since its reverse is a distinct semiprime: 3109485089 = 4013 ⋅774853.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9805849013 is a prime.

It is a super-3 number, since 3×9805849013³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9805849093) 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, 359081 + ... + 385422.

It is an arithmetic number, because the mean of its divisors is an integer number (2451651672).

Almost surely, 2^9805849013 is an apocalyptic number.

It is an amenable number.

9805849013 is a deficient number, since it is larger than the sum of its proper divisors (757675).

9805849013 is a wasteful number, since it uses less digits than its factorization.

9805849013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757674.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 9805849013 is about 99024.4869363129. The cubic root of 9805849013 is about 2140.4006159613.

The spelling of 9805849013 in words is "nine billion, eight hundred five million, eight hundred forty-nine thousand, thirteen".