9969919831 has 8 divisors (see below), whose sum is σ = 10352059200. Its totient is φ = 9590337120.

The previous prime is 9969919793. The next prime is 9969919877. The reversal of 9969919831 is 1389199699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9969919831 - 2¹⁵ = 9969887063 is a prime.

It is a super-2 number, since 2×9969919831² (a number of 21 digits) contains 22 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 (9969919231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631215 + ... + 646816.

It is an arithmetic number, because the mean of its divisors is an integer number (1294007400).

Almost surely, 2^9969919831 is an apocalyptic number.

9969919831 is a deficient number, since it is larger than the sum of its proper divisors (382139369).

9969919831 is a wasteful number, since it uses less digits than its factorization.

9969919831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278329.

The product of its digits is 8503056, while the sum is 64.

The square root of 9969919831 is about 99849.4858825022. The cubic root of 9969919831 is about 2152.2723284545.

The spelling of 9969919831 in words is "nine billion, nine hundred sixty-nine million, nine hundred nineteen thousand, eight hundred thirty-one".