499785617 has 2 divisors, whose sum is σ = 499785618. Its totient is φ = 499785616.

The previous prime is 499785589. The next prime is 499785619. The reversal of 499785617 is 716587994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287675521 + 212110096 = 16961^2 + 14564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499785617 is a prime.

Together with 499785619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (499785619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249892808 + 249892809.

It is an arithmetic number, because the mean of its divisors is an integer number (249892809).

Almost surely, 2^499785617 is an apocalyptic number.

It is an amenable number.

499785617 is a deficient number, since it is larger than the sum of its proper divisors (1).

499785617 is an equidigital number, since it uses as much as digits as its factorization.

499785617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 56.

The square root of 499785617 is about 22355.8855114263. The cubic root of 499785617 is about 793.5870725010.

The spelling of 499785617 in words is "four hundred ninety-nine million, seven hundred eighty-five thousand, six hundred seventeen".