1089816541 has 4 divisors (see below), whose sum is σ = 1188890784. Its totient is φ = 990742300.

The previous prime is 1089816527. The next prime is 1089816551. The reversal of 1089816541 is 1456189801.

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 1089816541 - 2⁵ = 1089816509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089816551) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 49537105 + ... + 49537126.

It is an arithmetic number, because the mean of its divisors is an integer number (297222696).

Almost surely, 2^1089816541 is an apocalyptic number.

1089816541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1089816541 is a deficient number, since it is larger than the sum of its proper divisors (99074243).

1089816541 is an equidigital number, since it uses as much as digits as its factorization.

1089816541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99074242.

The product of its (nonzero) digits is 69120, while the sum is 43.

The square root of 1089816541 is about 33012.3695150772. The cubic root of 1089816541 is about 1029.0847246628.

The spelling of 1089816541 in words is "one billion, eighty-nine million, eight hundred sixteen thousand, five hundred forty-one".