1091659932 has 144 divisors (see below), whose sum is σ = 3130493184. Its totient is φ = 317856000.

The previous prime is 1091659931. The next prime is 1091659967. The reversal of 1091659932 is 2399561901.

It is a happy number.

1091659932 is a `hidden beast` number, since 10 + 9 + 16 + 599 + 32 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091659931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1152283 + ... + 1153229.

It is an arithmetic number, because the mean of its divisors is an integer number (21739536).

Almost surely, 2^1091659932 is an apocalyptic number.

1091659932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091659932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565246592).

1091659932 is an abundant number, since it is smaller than the sum of its proper divisors (2038833252).

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

1091659932 is a wasteful number, since it uses less digits than its factorization.

1091659932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 1091659932 is about 33040.2774201428. The cubic root of 1091659932 is about 1029.6646194974.

The spelling of 1091659932 in words is "one billion, ninety-one million, six hundred fifty-nine thousand, nine hundred thirty-two".