1089799 has 2 divisors, whose sum is σ = 1089800. Its totient is φ = 1089798.

The previous prime is 1089793. The next prime is 1089841. The reversal of 1089799 is 9979801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1089799 - 2¹⁹ = 565511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089793) 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, 544899 + 544900.

It is an arithmetic number, because the mean of its divisors is an integer number (544900).

2^1089799 is an apocalyptic number.

1089799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089799 is an equidigital number, since it uses as much as digits as its factorization.

1089799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1089799 is about 1043.9343849112. The cubic root of 1089799 is about 102.9079203467.

The spelling of 1089799 in words is "one million, eighty-nine thousand, seven hundred ninety-nine".