499989859 has 2 divisors, whose sum is σ = 499989860. Its totient is φ = 499989858.

The previous prime is 499989829. The next prime is 499989877. The reversal of 499989859 is 958989994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 499989859 - 2⁵ = 499989827 is a prime.

It is not a weakly prime, because it can be changed into another prime (499989829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249994929 + 249994930.

It is an arithmetic number, because the mean of its divisors is an integer number (249994930).

Almost surely, 2^499989859 is an apocalyptic number.

499989859 is a deficient number, since it is larger than the sum of its proper divisors (1).

499989859 is an equidigital number, since it uses as much as digits as its factorization.

499989859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75582720, while the sum is 70.

The square root of 499989859 is about 22360.4530141945. The cubic root of 499989859 is about 793.6951600031.

The spelling of 499989859 in words is "four hundred ninety-nine million, nine hundred eighty-nine thousand, eight hundred fifty-nine".