1091930113 has 4 divisors (see below), whose sum is σ = 1092017200. Its totient is φ = 1091843028.

The previous prime is 1091930107. The next prime is 1091930159. The reversal of 1091930113 is 3110391901.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1091930113 is a prime.

It is a super-2 number, since 2×1091930113² = 2384622743352385538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091930173) 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, 20763 + ... + 51136.

It is an arithmetic number, because the mean of its divisors is an integer number (273004300).

Almost surely, 2^1091930113 is an apocalyptic number.

It is an amenable number.

1091930113 is a deficient number, since it is larger than the sum of its proper divisors (87087).

1091930113 is an equidigital number, since it uses as much as digits as its factorization.

1091930113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87086.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 1091930113 is about 33044.3658283829. The cubic root of 1091930113 is about 1029.7495583020.

The spelling of 1091930113 in words is "one billion, ninety-one million, nine hundred thirty thousand, one hundred thirteen".