1091159053 has 4 divisors (see below), whose sum is σ = 1091438080. Its totient is φ = 1090880028.

The previous prime is 1091159023. The next prime is 1091159057. The reversal of 1091159053 is 3509511901.

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 1091159053 - 2⁵ = 1091159021 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 (1091159057) 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, 133563 + ... + 141496.

It is an arithmetic number, because the mean of its divisors is an integer number (272859520).

Almost surely, 2^1091159053 is an apocalyptic number.

It is an amenable number.

1091159053 is a deficient number, since it is larger than the sum of its proper divisors (279027).

1091159053 is an equidigital number, since it uses as much as digits as its factorization.

1091159053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279026.

The product of its (nonzero) digits is 6075, while the sum is 34.

The square root of 1091159053 is about 33032.6967261227. The cubic root of 1091159053 is about 1029.5071173707.

The spelling of 1091159053 in words is "one billion, ninety-one million, one hundred fifty-nine thousand, fifty-three".