2820197 has 2 divisors, whose sum is σ = 2820198. Its totient is φ = 2820196.

The previous prime is 2820193. The next prime is 2820211. The reversal of 2820197 is 7910282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2819041 + 1156 = 1679^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820197 - 2² = 2820193 is a prime.

It is a super-2 number, since 2×2820197² = 15907022237618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410098 + 1410099.

It is an arithmetic number, because the mean of its divisors is an integer number (1410099).

2^2820197 is an apocalyptic number.

It is an amenable number.

2820197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820197 is an equidigital number, since it uses as much as digits as its factorization.

2820197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2820197 is about 1679.3442172467. The cubic root of 2820197 is about 141.2840542320.

It can be divided in two parts, 28 and 20197, that multiplied together give a triangular number (565516 = T₁₀₆₃).

The spelling of 2820197 in words is "two million, eight hundred twenty thousand, one hundred ninety-seven".