1093128961 has 4 divisors (see below), whose sum is σ = 1116387072. Its totient is φ = 1069870852.

The previous prime is 1093128901. The next prime is 1093128989. The reversal of 1093128961 is 1698213901.

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 1093128961 - 2⁷ = 1093128833 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1093128901) 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, 11628985 + ... + 11629078.

It is an arithmetic number, because the mean of its divisors is an integer number (279096768).

Almost surely, 2^1093128961 is an apocalyptic number.

It is an amenable number.

1093128961 is a deficient number, since it is larger than the sum of its proper divisors (23258111).

1093128961 is an equidigital number, since it uses as much as digits as its factorization.

1093128961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23258110.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1093128961 is about 33062.5008279773. The cubic root of 1093128961 is about 1030.1262801152.

The spelling of 1093128961 in words is "one billion, ninety-three million, one hundred twenty-eight thousand, nine hundred sixty-one".