499989817 has 4 divisors (see below), whose sum is σ = 502983936. Its totient is φ = 496995700.

The previous prime is 499989803. The next prime is 499989827. The reversal of 499989817 is 718989994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499989817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499989827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496809 + ... + 1497142.

It is an arithmetic number, because the mean of its divisors is an integer number (125745984).

Almost surely, 2^499989817 is an apocalyptic number.

It is an amenable number.

499989817 is a deficient number, since it is larger than the sum of its proper divisors (2994119).

499989817 is a wasteful number, since it uses less digits than its factorization.

499989817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994118.

The product of its digits is 11757312, while the sum is 64.

The square root of 499989817 is about 22360.4520750364. The cubic root of 499989817 is about 793.6951377792.

The spelling of 499989817 in words is "four hundred ninety-nine million, nine hundred eighty-nine thousand, eight hundred seventeen".