2808397 has 2 divisors, whose sum is σ = 2808398. Its totient is φ = 2808396.

The previous prime is 2808361. The next prime is 2808413. The reversal of 2808397 is 7938082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2604996 + 203401 = 1614^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 2808397 - 2⁷ = 2808269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2808307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404198 + 1404199.

It is an arithmetic number, because the mean of its divisors is an integer number (1404199).

2^2808397 is an apocalyptic number.

It is an amenable number.

2808397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2808397 is an equidigital number, since it uses as much as digits as its factorization.

2808397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2808397 is about 1675.8272584011. The cubic root of 2808397 is about 141.0867296670.

The spelling of 2808397 in words is "two million, eight hundred eight thousand, three hundred ninety-seven".