132391809 has 48 divisors (see below), whose sum is σ = 219098880. Its totient is φ = 76308480.

The previous prime is 132391807. The next prime is 132391843. The reversal of 132391809 is 908193231.

It is not a de Polignac number, because 132391809 - 2¹ = 132391807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (132391807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 171777 + ... + 172545.

It is an arithmetic number, because the mean of its divisors is an integer number (4564560).

Almost surely, 2^132391809 is an apocalyptic number.

It is an amenable number.

132391809 is a deficient number, since it is larger than the sum of its proper divisors (86707071).

132391809 is a wasteful number, since it uses less digits than its factorization.

132391809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 132391809 is about 11506.1639567668. The cubic root of 132391809 is about 509.6676150233.

The spelling of 132391809 in words is "one hundred thirty-two million, three hundred ninety-one thousand, eight hundred nine".