132961991 has 2 divisors, whose sum is σ = 132961992. Its totient is φ = 132961990.

The previous prime is 132961973. The next prime is 132961999. The reversal of 132961991 is 199169231.

It is a strong prime.

It is an emirp because it is prime and its reverse (199169231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 132961991 - 2¹⁰ = 132960967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132961999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66480995 + 66480996.

It is an arithmetic number, because the mean of its divisors is an integer number (66480996).

Almost surely, 2^132961991 is an apocalyptic number.

132961991 is a deficient number, since it is larger than the sum of its proper divisors (1).

132961991 is an equidigital number, since it uses as much as digits as its factorization.

132961991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 41.

The square root of 132961991 is about 11530.9145777774. The cubic root of 132961991 is about 510.3982420656.

The spelling of 132961991 in words is "one hundred thirty-two million, nine hundred sixty-one thousand, nine hundred ninety-one".