1085385869 has 4 divisors (see below), whose sum is σ = 1086567840. Its totient is φ = 1084203900.

The previous prime is 1085385853. The next prime is 1085385877. The reversal of 1085385869 is 9685835801.

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 1085385869 - 2⁴ = 1085385853 is a prime.

It is a super-2 number, since 2×1085385869² = 2356124969249770322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1085385869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085385839) 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 3 ways as a sum of consecutive naturals, for example, 589607 + ... + 591444.

It is an arithmetic number, because the mean of its divisors is an integer number (271641960).

Almost surely, 2^1085385869 is an apocalyptic number.

It is an amenable number.

1085385869 is a deficient number, since it is larger than the sum of its proper divisors (1181971).

1085385869 is an equidigital number, since it uses as much as digits as its factorization.

1085385869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181970.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The square root of 1085385869 is about 32945.1949303688. The cubic root of 1085385869 is about 1027.6882419639.

The spelling of 1085385869 in words is "one billion, eighty-five million, three hundred eighty-five thousand, eight hundred sixty-nine".