1089517885 has 4 divisors (see below), whose sum is σ = 1307421468. Its totient is φ = 871614304.

The previous prime is 1089517841. The next prime is 1089517901. The reversal of 1089517885 is 5887159801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5887159801 = 29423 ⋅200087.

It can be written as a sum of positive squares in 2 ways, for example, as 289646361 + 799871524 = 17019^2 + 28282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089517885 - 2⁷ = 1089517757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108951784 + ... + 108951793.

It is an arithmetic number, because the mean of its divisors is an integer number (326855367).

Almost surely, 2^1089517885 is an apocalyptic number.

It is an amenable number.

1089517885 is a deficient number, since it is larger than the sum of its proper divisors (217903583).

1089517885 is an equidigital number, since it uses as much as digits as its factorization.

1089517885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217903582.

The product of its (nonzero) digits is 806400, while the sum is 52.

The square root of 1089517885 is about 33007.8458097465. The cubic root of 1089517885 is about 1028.9907117731.

The spelling of 1089517885 in words is "one billion, eighty-nine million, five hundred seventeen thousand, eight hundred eighty-five".