1085803191 has 32 divisors (see below), whose sum is σ = 1795664640. Its totient is φ = 642751200.

The previous prime is 1085803183. The next prime is 1085803207. The reversal of 1085803191 is 1913085801.

It is not a de Polignac number, because 1085803191 - 2³ = 1085803183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085803091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29740 + ... + 55281.

It is an arithmetic number, because the mean of its divisors is an integer number (56114520).

Almost surely, 2^1085803191 is an apocalyptic number.

1085803191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1085803191 is a deficient number, since it is larger than the sum of its proper divisors (709861449).

1085803191 is a wasteful number, since it uses less digits than its factorization.

1085803191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85084 (or 85078 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 1085803191 is about 32951.5279008425. The cubic root of 1085803191 is about 1027.8199376647.

Adding to 1085803191 its reverse (1913085801), we get a palindrome (2998888992).

The spelling of 1085803191 in words is "one billion, eighty-five million, eight hundred three thousand, one hundred ninety-one".