131044209 has 4 divisors (see below), whose sum is σ = 174725616. Its totient is φ = 87362804.

The previous prime is 131044189. The next prime is 131044219. The reversal of 131044209 is 902440131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131044209 - 2⁹ = 131043697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131044219) 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, 21840699 + ... + 21840704.

It is an arithmetic number, because the mean of its divisors is an integer number (43681404).

Almost surely, 2^131044209 is an apocalyptic number.

It is an amenable number.

131044209 is a deficient number, since it is larger than the sum of its proper divisors (43681407).

131044209 is an equidigital number, since it uses as much as digits as its factorization.

131044209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43681406.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 131044209 is about 11447.4542584804. The cubic root of 131044209 is about 507.9324328368.

The spelling of 131044209 in words is "one hundred thirty-one million, forty-four thousand, two hundred nine".