9999898831 has 12 divisors (see below), whose sum is σ = 11465254512. Its totient is φ = 8687692416.

The previous prime is 9999898829. The next prime is 9999898837. The reversal of 9999898831 is 1388989999.

It is not a de Polignac number, because 9999898831 - 2¹ = 9999898829 is a prime.

It is a super-2 number, since 2×9999898831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999898837) 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, 1737451 + ... + 1743196.

It is an arithmetic number, because the mean of its divisors is an integer number (955437876).

Almost surely, 2^9999898831 is an apocalyptic number.

9999898831 is a deficient number, since it is larger than the sum of its proper divisors (1465355681).

9999898831 is a wasteful number, since it uses less digits than its factorization.

9999898831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480690 (or 3480677 counting only the distinct ones).

The product of its digits is 90699264, while the sum is 73.

The square root of 9999898831 is about 99999.4941537206. The cubic root of 9999898831 is about 2154.4274246073.

The spelling of 9999898831 in words is "nine billion, nine hundred ninety-nine million, eight hundred ninety-eight thousand, eight hundred thirty-one".