1091939912 has 36 divisors (see below), whose sum is σ = 2383082505. Its totient is φ = 467693856.

The previous prime is 1091939887. The next prime is 1091939941. The reversal of 1091939912 is 2199391901.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1090716676 + 1223236 = 33026^2 + 1106^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=23366.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 653414 + ... + 655082.

Almost surely, 2^1091939912 is an apocalyptic number.

It is an amenable number.

1091939912 is an abundant number, since it is smaller than the sum of its proper divisors (1291142593).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091939912 is an frugal number, since it uses more digits than its factorization.

1091939912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3358 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1091939912 is about 33044.5140984097. The cubic root of 1091939912 is about 1029.7526386230.

The spelling of 1091939912 in words is "one billion, ninety-one million, nine hundred thirty-nine thousand, nine hundred twelve".