9913838831 has 12 divisors (see below), whose sum is σ = 10771940088. Its totient is φ = 9070099584.

The previous prime is 9913838807. The next prime is 9913838861. The reversal of 9913838831 is 1388383199.

It is a happy number.

It is not a de Polignac number, because 9913838831 - 2¹⁴ = 9913822447 is a prime.

It is a super-2 number, since 2×9913838831² (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 (9913838861) 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, 136136 + ... + 195858.

It is an arithmetic number, because the mean of its divisors is an integer number (897661674).

Almost surely, 2^9913838831 is an apocalyptic number.

9913838831 is a deficient number, since it is larger than the sum of its proper divisors (858101257).

9913838831 is a wasteful number, since it uses less digits than its factorization.

9913838831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59962 (or 59849 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 53.

The square root of 9913838831 is about 99568.2621672187. The cubic root of 9913838831 is about 2148.2292130070.

The spelling of 9913838831 in words is "nine billion, nine hundred thirteen million, eight hundred thirty-eight thousand, eight hundred thirty-one".