131033809 has 3 divisors (see below), whose sum is σ = 131045257.
Its totient is φ = 131022362.
The previous prime is 131033801. The next prime is 131033813. The reversal of 131033809 is 908330131.
The square root of 131033809 is 11447.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is not a de Polignac number, because 131033809 - 23 = 131033801 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (131033801) 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 2 ways as a sum of consecutive naturals, for example, 5724 + ... + 17170.
Almost surely, 2131033809 is an apocalyptic number.
131033809 is the 11447-th square number.
131033809 is the 5724-th centered octagonal number.
It is an amenable number.
131033809 is a deficient number, since it is larger than the sum of its proper divisors (11448).
131033809 is an frugal number, since it uses more digits than its factorization.
131033809 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 22894 (or 11447 counting only the distinct ones).
The product of its (nonzero) digits is 1944, while the sum is 28.
The cubic root of 131033809 is about 507.9189955469.
The spelling of 131033809 in words is "one hundred thirty-one million, thirty-three thousand, eight hundred nine".