1091109293 has 4 divisors (see below), whose sum is σ = 1101119580. Its totient is φ = 1081099008.

The previous prime is 1091109289. The next prime is 1091109307. The reversal of 1091109293 is 3929011901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3929011901 = 29 ⋅135483169.

It can be written as a sum of positive squares in 2 ways, for example, as 593507044 + 497602249 = 24362^2 + 22307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091109293 - 2² = 1091109289 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 (1091109203) 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, 5004980 + ... + 5005197.

It is an arithmetic number, because the mean of its divisors is an integer number (275279895).

Almost surely, 2^1091109293 is an apocalyptic number.

It is an amenable number.

1091109293 is a deficient number, since it is larger than the sum of its proper divisors (10010287).

1091109293 is a wasteful number, since it uses less digits than its factorization.

1091109293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010286.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 1091109293 is about 33031.9435244128. The cubic root of 1091109293 is about 1029.4914676349.

The spelling of 1091109293 in words is "one billion, ninety-one million, one hundred nine thousand, two hundred ninety-three".