131800807 has 4 divisors (see below), whose sum is σ = 132094800. Its totient is φ = 131506816.

The previous prime is 131800789. The next prime is 131800811. The reversal of 131800807 is 708008131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131800807 - 2¹¹ = 131798759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131804807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146323 + ... + 147220.

It is an arithmetic number, because the mean of its divisors is an integer number (33023700).

Almost surely, 2^131800807 is an apocalyptic number.

131800807 is a deficient number, since it is larger than the sum of its proper divisors (293993).

131800807 is an equidigital number, since it uses as much as digits as its factorization.

131800807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293992.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 131800807 is about 11480.4532576027. The cubic root of 131800807 is about 508.9080919379.

Adding to 131800807 its reverse (708008131), we get a palindrome (839808938).

The spelling of 131800807 in words is "one hundred thirty-one million, eight hundred thousand, eight hundred seven".