1131109985 has 8 divisors (see below), whose sum is σ = 1416346560. Its totient is φ = 865544944.

The previous prime is 1131109963. The next prime is 1131110003. The reversal of 1131109985 is 5899011311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131109985 - 2³⁰ = 57368161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4917755 + ... + 4917984.

It is an arithmetic number, because the mean of its divisors is an integer number (177043320).

Almost surely, 2^1131109985 is an apocalyptic number.

It is an amenable number.

1131109985 is a deficient number, since it is larger than the sum of its proper divisors (285236575).

1131109985 is an equidigital number, since it uses as much as digits as its factorization.

1131109985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9835767.

The product of its (nonzero) digits is 9720, while the sum is 38.

The square root of 1131109985 is about 33631.9786066773. The cubic root of 1131109985 is about 1041.9213695528.

The spelling of 1131109985 in words is "one billion, one hundred thirty-one million, one hundred nine thousand, nine hundred eighty-five".