9899339841 has 12 divisors (see below), whose sum is σ = 14568840468. Its totient is φ = 6475039584.

The previous prime is 9899339831. The next prime is 9899339861. The reversal of 9899339841 is 1489339989.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4319249841 + 5580090000 = 65721^2 + 74700^2 .

It is not a de Polignac number, because 9899339841 - 2⁵ = 9899339809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9899339831) 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, 10376190 + ... + 10377143.

It is an arithmetic number, because the mean of its divisors is an integer number (1214070039).

Almost surely, 2^9899339841 is an apocalyptic number.

It is an amenable number.

9899339841 is a deficient number, since it is larger than the sum of its proper divisors (4669500627).

9899339841 is a wasteful number, since it uses less digits than its factorization.

9899339841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20753392 (or 20753389 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 63.

The square root of 9899339841 is about 99495.4262315610. The cubic root of 9899339841 is about 2147.1814402590.

The spelling of 9899339841 in words is "nine billion, eight hundred ninety-nine million, three hundred thirty-nine thousand, eight hundred forty-one".