2806493 has 2 divisors, whose sum is σ = 2806494. Its totient is φ = 2806492.

The previous prime is 2806469. The next prime is 2806499. The reversal of 2806493 is 3946082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 840889 = 1402^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 2806493 - 2¹⁶ = 2740957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2806499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403246 + 1403247.

It is an arithmetic number, because the mean of its divisors is an integer number (1403247).

2^2806493 is an apocalyptic number.

It is an amenable number.

2806493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2806493 is an equidigital number, since it uses as much as digits as its factorization.

2806493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2806493 is about 1675.2590844404. The cubic root of 2806493 is about 141.0548384180.

The spelling of 2806493 in words is "two million, eight hundred six thousand, four hundred ninety-three".