2820109 has 2 divisors, whose sum is σ = 2820110. Its totient is φ = 2820108.

The previous prime is 2820089. The next prime is 2820119. The reversal of 2820109 is 9010282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2630884 + 189225 = 1622^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820109 - 2⁷ = 2819981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2820109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410054 + 1410055.

It is an arithmetic number, because the mean of its divisors is an integer number (1410055).

2^2820109 is an apocalyptic number.

It is an amenable number.

2820109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820109 is an equidigital number, since it uses as much as digits as its factorization.

2820109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 2820109 is about 1679.3180163388. The cubic root of 2820109 is about 141.2825846980.

The spelling of 2820109 in words is "two million, eight hundred twenty thousand, one hundred nine".