1089143521 has 4 divisors (see below), whose sum is σ = 1096356544. Its totient is φ = 1081930500.

The previous prime is 1089143483. The next prime is 1089143537. The reversal of 1089143521 is 1253419801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1089143521 - 2¹³ = 1089135329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089143921) 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, 3606285 + ... + 3606586.

It is an arithmetic number, because the mean of its divisors is an integer number (274089136).

Almost surely, 2^1089143521 is an apocalyptic number.

It is an amenable number.

1089143521 is a deficient number, since it is larger than the sum of its proper divisors (7213023).

1089143521 is an equidigital number, since it uses as much as digits as its factorization.

1089143521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7213022.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1089143521 is about 33002.1744889636. The cubic root of 1089143521 is about 1028.8728427556.

The spelling of 1089143521 in words is "one billion, eighty-nine million, one hundred forty-three thousand, five hundred twenty-one".