131941209 has 8 divisors (see below), whose sum is σ = 176104512. Its totient is φ = 87869360.

The previous prime is 131941193. The next prime is 131941211. The reversal of 131941209 is 902149131.

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

It is a cyclic number.

It is not a de Polignac number, because 131941209 - 2⁴ = 131941193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131941219) 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, 19422 + ... + 25319.

It is an arithmetic number, because the mean of its divisors is an integer number (22013064).

Almost surely, 2^131941209 is an apocalyptic number.

It is an amenable number.

131941209 is a deficient number, since it is larger than the sum of its proper divisors (44163303).

131941209 is an equidigital number, since it uses as much as digits as its factorization.

131941209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45727.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 131941209 is about 11486.5664582590. The cubic root of 131941209 is about 509.0887341232.

The spelling of 131941209 in words is "one hundred thirty-one million, nine hundred forty-one thousand, two hundred nine".