8500013 has 4 divisors (see below), whose sum is σ = 8587740. Its totient is φ = 8412288.

The previous prime is 8500007. The next prime is 8500021. The reversal of 8500013 is 3100058.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1646089 + 6853924 = 1283^2 + 2618^2 .

It is a cyclic number.

It is not a de Polignac number, because 8500013 - 2¹⁰ = 8498989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8499964 and 8500000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8500213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43718 + ... + 43911.

It is an arithmetic number, because the mean of its divisors is an integer number (2146935).

Almost surely, 2^8500013 is an apocalyptic number.

It is an amenable number.

8500013 is a deficient number, since it is larger than the sum of its proper divisors (87727).

8500013 is an equidigital number, since it uses as much as digits as its factorization.

8500013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87726.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 8500013 is about 2915.4781769034. The cubic root of 8500013 is about 204.0828591380.

The spelling of 8500013 in words is "eight million, five hundred thousand, thirteen".