1085403789 has 6 divisors (see below), whose sum is σ = 1567805486. Its totient is φ = 723602520.

The previous prime is 1085403779. The next prime is 1085403799. The reversal of 1085403789 is 9873045801.

It is an interprime number because it is at equal distance from previous prime (1085403779) and next prime (1085403799).

It can be written as a sum of positive squares in only one way, i.e., 804573225 + 280830564 = 28365^2 + 16758^2 .

It is not a de Polignac number, because 1085403789 - 2⁵ = 1085403757 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 (1085403779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60300202 + ... + 60300219.

Almost surely, 2^1085403789 is an apocalyptic number.

It is an amenable number.

1085403789 is a deficient number, since it is larger than the sum of its proper divisors (482401697).

1085403789 is a wasteful number, since it uses less digits than its factorization.

1085403789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120600427 (or 120600424 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1085403789 is about 32945.4668960693. The cubic root of 1085403789 is about 1027.6938977319.

The spelling of 1085403789 in words is "one billion, eighty-five million, four hundred three thousand, seven hundred eighty-nine".