132191991 has 12 divisors (see below), whose sum is σ = 191065368. Its totient is φ = 88071984.

The previous prime is 132191981. The next prime is 132191999. The reversal of 132191991 is 199191231.

It is not a de Polignac number, because 132191991 - 2⁷ = 132191863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132191999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14361 + ... + 21693.

It is an arithmetic number, because the mean of its divisors is an integer number (15922114).

Almost surely, 2^132191991 is an apocalyptic number.

132191991 is a deficient number, since it is larger than the sum of its proper divisors (58873377).

132191991 is a wasteful number, since it uses less digits than its factorization.

132191991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342 (or 9339 counting only the distinct ones).

The product of its digits is 4374, while the sum is 36.

The square root of 132191991 is about 11497.4775929332. The cubic root of 132191991 is about 509.4110733658.

The spelling of 132191991 in words is "one hundred thirty-two million, one hundred ninety-one thousand, nine hundred ninety-one".