132443991 has 28 divisors (see below), whose sum is σ = 210275712. Its totient is φ = 83094336.

The previous prime is 132443977. The next prime is 132444019. The reversal of 132443991 is 199344231.

132443991 is a `hidden beast` number, since 132 + 4 + 439 + 91 = 666.

It is not a de Polignac number, because 132443991 - 2¹¹ = 132441943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132443951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7050 + ... + 17736.

Almost surely, 2^132443991 is an apocalyptic number.

132443991 is a deficient number, since it is larger than the sum of its proper divisors (77831721).

132443991 is an equidigital number, since it uses as much as digits as its factorization.

132443991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722 (or 10707 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 132443991 is about 11508.4313005726. The cubic root of 132443991 is about 509.7345677607.

The spelling of 132443991 in words is "one hundred thirty-two million, four hundred forty-three thousand, nine hundred ninety-one".