499689811 has 2 divisors, whose sum is σ = 499689812. Its totient is φ = 499689810.

The previous prime is 499689809. The next prime is 499689859. The reversal of 499689811 is 118986994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 499689811 - 2¹ = 499689809 is a prime.

Together with 499689809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (499689871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249844905 + 249844906.

It is an arithmetic number, because the mean of its divisors is an integer number (249844906).

Almost surely, 2^499689811 is an apocalyptic number.

499689811 is a deficient number, since it is larger than the sum of its proper divisors (1).

499689811 is an equidigital number, since it uses as much as digits as its factorization.

499689811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 55.

The square root of 499689811 is about 22353.7426620242. The cubic root of 499689811 is about 793.5363605829.

It can be divided in two parts, 499689 and 811, that added together give a triangular number (500500 = T₁₀₀₀).

The spelling of 499689811 in words is "four hundred ninety-nine million, six hundred eighty-nine thousand, eight hundred eleven".