131104209 has 32 divisors (see below), whose sum is σ = 189768960. Its totient is φ = 80289792.

The previous prime is 131104201. The next prime is 131104223. The reversal of 131104209 is 902401131.

It is not a de Polignac number, because 131104209 - 2³ = 131104201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131104201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226929 + ... + 227505.

It is an arithmetic number, because the mean of its divisors is an integer number (5930280).

Almost surely, 2^131104209 is an apocalyptic number.

It is an amenable number.

131104209 is a deficient number, since it is larger than the sum of its proper divisors (58664751).

131104209 is a wasteful number, since it uses less digits than its factorization.

131104209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 131104209 is about 11450.0746285778. The cubic root of 131104209 is about 508.0099417837.

The spelling of 131104209 in words is "one hundred thirty-one million, one hundred four thousand, two hundred nine".