131889309 has 8 divisors (see below), whose sum is σ = 176043840. Its totient is φ = 87830496.

The previous prime is 131889271. The next prime is 131889313. The reversal of 131889309 is 903988131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131889309 - 2⁷ = 131889181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131889389) 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 7 ways as a sum of consecutive naturals, for example, 20649 + ... + 26270.

It is an arithmetic number, because the mean of its divisors is an integer number (22005480).

Almost surely, 2^131889309 is an apocalyptic number.

It is an amenable number.

131889309 is a deficient number, since it is larger than the sum of its proper divisors (44154531).

131889309 is an equidigital number, since it uses as much as digits as its factorization.

131889309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47859.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 131889309 is about 11484.3070753093. The cubic root of 131889309 is about 509.0219741608.

The spelling of 131889309 in words is "one hundred thirty-one million, eight hundred eighty-nine thousand, three hundred nine".