132991441 has 4 divisors (see below), whose sum is σ = 145081584. Its totient is φ = 120901300.

The previous prime is 132991381. The next prime is 132991489. The reversal of 132991441 is 144199231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144199231 = 11 ⋅13109021.

It is a cyclic number.

It is not a de Polignac number, because 132991441 - 2⁹ = 132990929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 132991397 and 132991406.

It is not an unprimeable number, because it can be changed into a prime (132991141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6045055 + ... + 6045076.

It is an arithmetic number, because the mean of its divisors is an integer number (36270396).

Almost surely, 2^132991441 is an apocalyptic number.

132991441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

132991441 is a deficient number, since it is larger than the sum of its proper divisors (12090143).

132991441 is a wasteful number, since it uses less digits than its factorization.

132991441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12090142.

The product of its digits is 7776, while the sum is 34.

The square root of 132991441 is about 11532.1915089891. The cubic root of 132991441 is about 510.4359223042.

The spelling of 132991441 in words is "one hundred thirty-two million, nine hundred ninety-one thousand, four hundred forty-one".