132779891 has 4 divisors (see below), whose sum is σ = 133156392. Its totient is φ = 132403392.

The previous prime is 132779879. The next prime is 132779909. The reversal of 132779891 is 198977231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 132779891 - 2⁶ = 132779827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132779861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187721 + ... + 188426.

It is an arithmetic number, because the mean of its divisors is an integer number (33289098).

Almost surely, 2^132779891 is an apocalyptic number.

132779891 is a deficient number, since it is larger than the sum of its proper divisors (376501).

132779891 is an equidigital number, since it uses as much as digits as its factorization.

132779891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376500.

The product of its digits is 190512, while the sum is 47.

The square root of 132779891 is about 11523.0157077043. The cubic root of 132779891 is about 510.1651278696.

It can be divided in two parts, 1327 and 79891, that added together give a palindrome (81218).

The spelling of 132779891 in words is "one hundred thirty-two million, seven hundred seventy-nine thousand, eight hundred ninety-one".