1085991937 has 12 divisors (see below), whose sum is σ = 1110457600. Its totient is φ = 1062038232.

The previous prime is 1085991923. The next prime is 1085992007. The reversal of 1085991937 is 7391995801.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1085991937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085994937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775564 + ... + 776962.

Almost surely, 2^1085991937 is an apocalyptic number.

It is an amenable number.

1085991937 is a deficient number, since it is larger than the sum of its proper divisors (24465663).

1085991937 is an equidigital number, since it uses as much as digits as its factorization.

1085991937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 52.

The square root of 1085991937 is about 32954.3917710523. The cubic root of 1085991937 is about 1027.8794897897.

The spelling of 1085991937 in words is "one billion, eighty-five million, nine hundred ninety-one thousand, nine hundred thirty-seven".