1090819 has 2 divisors, whose sum is σ = 1090820. Its totient is φ = 1090818.

The previous prime is 1090807. The next prime is 1090841. The reversal of 1090819 is 9180901.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090819 is a prime.

It is a super-2 number, since 2×1090819² = 2379772181522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1090849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545409 + 545410.

It is an arithmetic number, because the mean of its divisors is an integer number (545410).

2^1090819 is an apocalyptic number.

1090819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090819 is an equidigital number, since it uses as much as digits as its factorization.

1090819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1090819 is about 1044.4228071045. The cubic root of 1090819 is about 102.9400159741.

The spelling of 1090819 in words is "one million, ninety thousand, eight hundred nineteen".