132009991 has 2 divisors, whose sum is σ = 132009992. Its totient is φ = 132009990.

The previous prime is 132009989. The next prime is 132010007. The reversal of 132009991 is 199900231.

It is a weak prime.

It is an emirp because it is prime and its reverse (199900231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 132009991 - 2¹ = 132009989 is a prime.

Together with 132009989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132009931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66004995 + 66004996.

It is an arithmetic number, because the mean of its divisors is an integer number (66004996).

Almost surely, 2^132009991 is an apocalyptic number.

132009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

132009991 is an equidigital number, since it uses as much as digits as its factorization.

132009991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 132009991 is about 11489.5600873140. The cubic root of 132009991 is about 509.1771827552.

The spelling of 132009991 in words is "one hundred thirty-two million, nine thousand, nine hundred ninety-one".