1008500813 has 2 divisors, whose sum is σ = 1008500814. Its totient is φ = 1008500812.

The previous prime is 1008500797. The next prime is 1008500873. The reversal of 1008500813 is 3180058001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 890604649 + 117896164 = 29843^2 + 10858^2 .

It is an emirp because it is prime and its reverse (3180058001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1008500813 - 2⁴ = 1008500797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1008500873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504250406 + 504250407.

It is an arithmetic number, because the mean of its divisors is an integer number (504250407).

Almost surely, 2^1008500813 is an apocalyptic number.

It is an amenable number.

1008500813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008500813 is an equidigital number, since it uses as much as digits as its factorization.

1008500813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1008500813 is about 31756.9018167705. The cubic root of 1008500813 is about 1002.8256127261.

Adding to 1008500813 its reverse (3180058001), we get a palindrome (4188558814).

The spelling of 1008500813 in words is "one billion, eight million, five hundred thousand, eight hundred thirteen".