1132561909 has 4 divisors (see below), whose sum is σ = 1134491904. Its totient is φ = 1130631916.

The previous prime is 1132561891. The next prime is 1132561921. The reversal of 1132561909 is 9091652311.

It is a happy number.

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 1132561909 - 2⁵ = 1132561877 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 (1132561999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964117 + ... + 965290.

It is an arithmetic number, because the mean of its divisors is an integer number (283622976).

Almost surely, 2^1132561909 is an apocalyptic number.

It is an amenable number.

1132561909 is a deficient number, since it is larger than the sum of its proper divisors (1929995).

1132561909 is an equidigital number, since it uses as much as digits as its factorization.

1132561909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929994.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1132561909 is about 33653.5571522536. The cubic root of 1132561909 is about 1042.3669919465.

The spelling of 1132561909 in words is "one billion, one hundred thirty-two million, five hundred sixty-one thousand, nine hundred nine".