1091118853 has 4 divisors (see below), whose sum is σ = 1190311488. Its totient is φ = 991926220.

The previous prime is 1091118839. The next prime is 1091118877. The reversal of 1091118853 is 3588111901.

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 an emirpimes, since its reverse is a distinct semiprime: 3588111901 = 11 ⋅326191991.

It is a cyclic number.

It is not a de Polignac number, because 1091118853 - 2¹³ = 1091110661 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 (1091118893) 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, 49596301 + ... + 49596322.

It is an arithmetic number, because the mean of its divisors is an integer number (297577872).

Almost surely, 2^1091118853 is an apocalyptic number.

It is an amenable number.

1091118853 is a deficient number, since it is larger than the sum of its proper divisors (99192635).

1091118853 is an equidigital number, since it uses as much as digits as its factorization.

1091118853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99192634.

The product of its (nonzero) digits is 8640, while the sum is 37.

The square root of 1091118853 is about 33032.0882325051. The cubic root of 1091118853 is about 1029.4944743333.

The spelling of 1091118853 in words is "one billion, ninety-one million, one hundred eighteen thousand, eight hundred fifty-three".