1055118091 has 4 divisors (see below), whose sum is σ = 1055191384. Its totient is φ = 1055044800.

The previous prime is 1055118061. The next prime is 1055118109. The reversal of 1055118091 is 1908115501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1908115501 = 601 ⋅3174901.

It is a cyclic number.

It is not a de Polignac number, because 1055118091 - 2⁷ = 1055117963 is a prime.

It is a super-2 number, since 2×1055118091² = 2226548371910968562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055118041) 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, 7125 + ... + 46486.

It is an arithmetic number, because the mean of its divisors is an integer number (263797846).

Almost surely, 2^1055118091 is an apocalyptic number.

1055118091 is a deficient number, since it is larger than the sum of its proper divisors (73293).

1055118091 is an equidigital number, since it uses as much as digits as its factorization.

1055118091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73292.

The product of its (nonzero) digits is 1800, while the sum is 31.

The square root of 1055118091 is about 32482.5813475469. The cubic root of 1055118091 is about 1018.0451122701.

The spelling of 1055118091 in words is "one billion, fifty-five million, one hundred eighteen thousand, ninety-one".