1089319021 has 8 divisors (see below), whose sum is σ = 1257771200. Its totient is φ = 924075648.

The previous prime is 1089319019. The next prime is 1089319027. The reversal of 1089319021 is 1209139801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1089319021 - 2¹ = 1089319019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089319027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801471 + ... + 802828.

It is an arithmetic number, because the mean of its divisors is an integer number (157221400).

Almost surely, 2^1089319021 is an apocalyptic number.

It is an amenable number.

1089319021 is a deficient number, since it is larger than the sum of its proper divisors (168452179).

1089319021 is an equidigital number, since it uses as much as digits as its factorization.

1089319021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604403.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1089319021 is about 33004.8332975642. The cubic root of 1089319021 is about 1028.9281025332.

The spelling of 1089319021 in words is "one billion, eighty-nine million, three hundred nineteen thousand, twenty-one".