1822091 has 2 divisors, whose sum is σ = 1822092. Its totient is φ = 1822090.

The previous prime is 1822063. The next prime is 1822109. The reversal of 1822091 is 1902281.

Together with next prime (1822109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1822091 - 2⁶ = 1822027 is a prime.

It is a super-2 number, since 2×1822091² = 6640031224562, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1822021) 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, 911045 + 911046.

It is an arithmetic number, because the mean of its divisors is an integer number (911046).

2^1822091 is an apocalyptic number.

1822091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1822091 is an equidigital number, since it uses as much as digits as its factorization.

1822091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1822091 is about 1349.8485100188. The cubic root of 1822091 is about 122.1396546409.

The spelling of 1822091 in words is "one million, eight hundred twenty-two thousand, ninety-one".