999996131 has 2 divisors, whose sum is σ = 999996132. Its totient is φ = 999996130.

The previous prime is 999996113. The next prime is 999996149. The reversal of 999996131 is 131699999.

Together with previous prime (999996113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (999996113) and next prime (999996149).

It is an emirp because it is prime and its reverse (131699999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999996131 - 2¹⁰ = 999995107 is a prime.

It is a super-2 number, since 2×999996131² = 1999984524029938322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999996181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998065 + 499998066.

It is an arithmetic number, because the mean of its divisors is an integer number (499998066).

Almost surely, 2^999996131 is an apocalyptic number.

999996131 is a deficient number, since it is larger than the sum of its proper divisors (1).

999996131 is an equidigital number, since it uses as much as digits as its factorization.

999996131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1062882, while the sum is 56.

The square root of 999996131 is about 31622.7154273633. The cubic root of 999996131 is about 999.9987103317.

The spelling of 999996131 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, one hundred thirty-one".