2806291 has 2 divisors, whose sum is σ = 2806292. Its totient is φ = 2806290.

The previous prime is 2806283. The next prime is 2806333. The reversal of 2806291 is 1926082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2806291 - 2³ = 2806283 is a prime.

It is equal to p₂₀₃₇₉₇ and since 2806291 and 203797 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2806201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1403145 + 1403146.

It is an arithmetic number, because the mean of its divisors is an integer number (1403146).

2^2806291 is an apocalyptic number.

2806291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2806291 is an equidigital number, since it uses as much as digits as its factorization.

2806291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2806291 is about 1675.1987941734. The cubic root of 2806291 is about 141.0514541515.

The spelling of 2806291 in words is "two million, eight hundred six thousand, two hundred ninety-one".