1089199786 has 4 divisors (see below), whose sum is σ = 1633799682. Its totient is φ = 544599892.

The previous prime is 1089199751. The next prime is 1089199807. The reversal of 1089199786 is 6879919801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6879919801 = 659 ⋅10439939.

It can be written as a sum of positive squares in only one way, i.e., 749719161 + 339480625 = 27381^2 + 18425^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089199786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272299945 + ... + 272299948.

Almost surely, 2^1089199786 is an apocalyptic number.

1089199786 is a deficient number, since it is larger than the sum of its proper divisors (544599896).

1089199786 is an equidigital number, since it uses as much as digits as its factorization.

1089199786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544599895.

The product of its (nonzero) digits is 1959552, while the sum is 58.

The square root of 1089199786 is about 33003.0269217840. The cubic root of 1089199786 is about 1028.8905595923.

The spelling of 1089199786 in words is "one billion, eighty-nine million, one hundred ninety-nine thousand, seven hundred eighty-six".