9999748431 has 16 divisors (see below), whose sum is σ = 15594150400. Its totient is φ = 6315630264.

The previous prime is 9999748403. The next prime is 9999748441. The reversal of 9999748431 is 1348479999.

It is not a de Polignac number, because 9999748431 - 2¹⁴ = 9999732047 is a prime.

It is a super-2 number, since 2×9999748431² (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 (9999748441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9745831 + ... + 9746856.

It is an arithmetic number, because the mean of its divisors is an integer number (974634400).

Almost surely, 2^9999748431 is an apocalyptic number.

9999748431 is a deficient number, since it is larger than the sum of its proper divisors (5594401969).

9999748431 is a wasteful number, since it uses less digits than its factorization.

9999748431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19492715 (or 19492709 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The square root of 9999748431 is about 99998.7421470890. The cubic root of 9999748431 is about 2154.4166235810.

The spelling of 9999748431 in words is "nine billion, nine hundred ninety-nine million, seven hundred forty-eight thousand, four hundred thirty-one".