1006819 has 4 divisors (see below), whose sum is σ = 1098360. Its totient is φ = 915280.

The previous prime is 1006799. The next prime is 1006847. The reversal of 1006819 is 9186001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1006819 - 2⁹ = 1006307 is a prime.

It is a super-2 number, since 2×1006819² = 2027368997522, which contains 22 as substring.

It is a Duffinian number.

1006819 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1006793 and 1006802.

It is not an unprimeable number, because it can be changed into a prime (1006879) 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 in 3 ways as a sum of consecutive naturals, for example, 45754 + ... + 45775.

It is an arithmetic number, because the mean of its divisors is an integer number (274590).

2^1006819 is an apocalyptic number.

1006819 is a deficient number, since it is larger than the sum of its proper divisors (91541).

1006819 is an equidigital number, since it uses as much as digits as its factorization.

1006819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91540.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1006819 is about 1003.4037073880. The cubic root of 1006819 is about 100.2267852955.

The spelling of 1006819 in words is "one million, six thousand, eight hundred nineteen".