1089447091 has 4 divisors (see below), whose sum is σ = 1153532232. Its totient is φ = 1025361952.

The previous prime is 1089447083. The next prime is 1089447157. The reversal of 1089447091 is 1907449801.

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 1089447091 - 2³ = 1089447083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089447071) 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, 32042545 + ... + 32042578.

It is an arithmetic number, because the mean of its divisors is an integer number (288383058).

Almost surely, 2^1089447091 is an apocalyptic number.

1089447091 is a deficient number, since it is larger than the sum of its proper divisors (64085141).

1089447091 is an equidigital number, since it uses as much as digits as its factorization.

1089447091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64085140.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1089447091 is about 33006.7734109228. The cubic root of 1089447091 is about 1028.9684242558.

The spelling of 1089447091 in words is "one billion, eighty-nine million, four hundred forty-seven thousand, ninety-one".