1089181799 has 4 divisors (see below), whose sum is σ = 1095199560. Its totient is φ = 1083164040.

The previous prime is 1089181781. The next prime is 1089181867. The reversal of 1089181799 is 9971819801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9971819801 = 12841 ⋅776561.

It is a cyclic number.

It is not a de Polignac number, because 1089181799 - 2¹² = 1089177703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089181799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089181759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3008609 + ... + 3008970.

It is an arithmetic number, because the mean of its divisors is an integer number (273799890).

Almost surely, 2^1089181799 is an apocalyptic number.

1089181799 is a deficient number, since it is larger than the sum of its proper divisors (6017761).

1089181799 is an equidigital number, since it uses as much as digits as its factorization.

1089181799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6017760.

The product of its (nonzero) digits is 326592, while the sum is 53.

The square root of 1089181799 is about 33002.7544153515. The cubic root of 1089181799 is about 1028.8848958758.

The spelling of 1089181799 in words is "one billion, eighty-nine million, one hundred eighty-one thousand, seven hundred ninety-nine".