1093197804721 has 15 divisors (see below), whose sum is σ = 1202649297915. Its totient is φ = 993701174400.

The previous prime is 1093197804719. The next prime is 1093197804779. The reversal of 1093197804721 is 1274087913901.

It is a happy number.

The square root of 1093197804721 is 1045561.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 30401758321 + 1062796046400 = 174361^2 + 1030920^2 .

It is not a de Polignac number, because 1093197804721 - 2¹ = 1093197804719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1093197804701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 126508561 + ... + 126517201.

It is an arithmetic number, because the mean of its divisors is an integer number (80176619861).

Almost surely, 2^{1093197804721} is an apocalyptic number.

1093197804721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1093197804721 is the 1045561-st square number.

1093197804721 is the 522781-st centered octagonal number.

It is an amenable number.

1093197804721 is a deficient number, since it is larger than the sum of its proper divisors (109451493194).

1093197804721 is an frugal number, since it uses more digits than its factorization.

1093197804721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17326 (or 8652 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 1093197804721 in words is "one trillion, ninety-three billion, one hundred ninety-seven million, eight hundred four thousand, seven hundred twenty-one".