499999831 has 2 divisors, whose sum is σ = 499999832. Its totient is φ = 499999830.

The previous prime is 499999751. The next prime is 499999847. The reversal of 499999831 is 138999994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 499999831 - 2⁹ = 499999319 is a prime.

It is a super-2 number, since 2×499999831² = 499999662000057122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 499999831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499999931) 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, 249999915 + 249999916.

It is an arithmetic number, because the mean of its divisors is an integer number (249999916).

Almost surely, 2^499999831 is an apocalyptic number.

499999831 is a deficient number, since it is larger than the sum of its proper divisors (1).

499999831 is an equidigital number, since it uses as much as digits as its factorization.

499999831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 61.

The square root of 499999831 is about 22360.6759960427. The cubic root of 499999831 is about 793.7004365605.

The spelling of 499999831 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred thirty-one".