131961109 has 8 divisors (see below), whose sum is σ = 154320320. Its totient is φ = 110478816.

The previous prime is 131961103. The next prime is 131961121. The reversal of 131961109 is 901169131.

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

It is not a de Polignac number, because 131961109 - 2¹³ = 131952917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131961103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218904 + ... + 219505.

It is an arithmetic number, because the mean of its divisors is an integer number (19290040).

Almost surely, 2^131961109 is an apocalyptic number.

It is an amenable number.

131961109 is a deficient number, since it is larger than the sum of its proper divisors (22359211).

131961109 is an equidigital number, since it uses as much as digits as its factorization.

131961109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438459.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 131961109 is about 11487.4326548624. The cubic root of 131961109 is about 509.1143272304.

The spelling of 131961109 in words is "one hundred thirty-one million, nine hundred sixty-one thousand, one hundred nine".