9999969131 has 2 divisors, whose sum is σ = 9999969132. Its totient is φ = 9999969130.

The previous prime is 9999969121. The next prime is 9999969151. The reversal of 9999969131 is 1319699999.

9999969131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1319699999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999969131 - 2¹⁴ = 9999952747 is a prime.

It is a super-2 number, since 2×9999969131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9999969121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999984565 + 4999984566.

It is an arithmetic number, because the mean of its divisors is an integer number (4999984566).

Almost surely, 2^9999969131 is an apocalyptic number.

9999969131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999969131 is an equidigital number, since it uses as much as digits as its factorization.

9999969131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9565938, while the sum is 65.

The square root of 9999969131 is about 99999.8456548809. The cubic root of 9999969131 is about 2154.4324731881.

The spelling of 9999969131 in words is "nine billion, nine hundred ninety-nine million, nine hundred sixty-nine thousand, one hundred thirty-one".