132978191 has 4 divisors (see below), whose sum is σ = 133140984. Its totient is φ = 132815400.

The previous prime is 132978163. The next prime is 132978217. The reversal of 132978191 is 191879231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191879231 = 397 ⋅483323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132978191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132978151) 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, 80165 + ... + 81806.

It is an arithmetic number, because the mean of its divisors is an integer number (33285246).

Almost surely, 2^132978191 is an apocalyptic number.

132978191 is a deficient number, since it is larger than the sum of its proper divisors (162793).

132978191 is an equidigital number, since it uses as much as digits as its factorization.

132978191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162792.

The product of its digits is 27216, while the sum is 41.

The square root of 132978191 is about 11531.6170158395. The cubic root of 132978191 is about 510.4189700839.

The spelling of 132978191 in words is "one hundred thirty-two million, nine hundred seventy-eight thousand, one hundred ninety-one".