1131005817 has 12 divisors (see below), whose sum is σ = 1649537344. Its totient is φ = 746682840.

The previous prime is 1131005809. The next prime is 1131005833. The reversal of 1131005817 is 7185001311.

It is not a de Polignac number, because 1131005817 - 2³ = 1131005809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131005417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 609109 + ... + 610962.

Almost surely, 2^1131005817 is an apocalyptic number.

It is an amenable number.

1131005817 is a deficient number, since it is larger than the sum of its proper divisors (518531527).

1131005817 is a wasteful number, since it uses less digits than its factorization.

1131005817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220180 (or 1220177 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

The square root of 1131005817 is about 33630.4299258871. The cubic root of 1131005817 is about 1041.8893838046.

The spelling of 1131005817 in words is "one billion, one hundred thirty-one million, five thousand, eight hundred seventeen".