999999949013831 has 2 divisors, whose sum is σ = 999999949013832. Its totient is φ = 999999949013830.

The previous prime is 999999949013759. The next prime is 999999949013861. The reversal of 999999949013831 is 138310949999999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999999949013831 - 2¹⁴ = 999999948997447 is a prime.

It is a super-2 number, since 2×999999949013831² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999949013861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999974506915 + 499999974506916.

It is an arithmetic number, because the mean of its divisors is an integer number (499999974506916).

Almost surely, 2^{999999949013831} is an apocalyptic number.

999999949013831 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999949013831 is an equidigital number, since it uses as much as digits as its factorization.

999999949013831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12397455648, while the sum is 92.

The spelling of 999999949013831 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred forty-nine million, thirteen thousand, eight hundred thirty-one".