2820317 has 4 divisors (see below), whose sum is σ = 2986236. Its totient is φ = 2654400.

The previous prime is 2820313. The next prime is 2820319. The reversal of 2820317 is 7130282.

2820317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1406596 + 1413721 = 1186^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820317 - 2² = 2820313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2820292 and 2820301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820313) 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, 82934 + ... + 82967.

It is an arithmetic number, because the mean of its divisors is an integer number (746559).

2^2820317 is an apocalyptic number.

It is an amenable number.

2820317 is a deficient number, since it is larger than the sum of its proper divisors (165919).

2820317 is a wasteful number, since it uses less digits than its factorization.

2820317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165918.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2820317 is about 1679.3799450988. The cubic root of 2820317 is about 141.2860580928.

Adding to 2820317 its reverse (7130282), we get a palindrome (9950599).

The spelling of 2820317 in words is "two million, eight hundred twenty thousand, three hundred seventeen".