131300405 has 4 divisors (see below), whose sum is σ = 157560492. Its totient is φ = 105040320.

The previous prime is 131300363. The next prime is 131300413. The reversal of 131300405 is 504003131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45941284 + 85359121 = 6778^2 + 9239^2 .

It is not a de Polignac number, because 131300405 - 2⁸ = 131300149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 13130036 + ... + 13130045.

It is an arithmetic number, because the mean of its divisors is an integer number (39390123).

Almost surely, 2^131300405 is an apocalyptic number.

It is an amenable number.

131300405 is a deficient number, since it is larger than the sum of its proper divisors (26260087).

131300405 is an equidigital number, since it uses as much as digits as its factorization.

131300405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26260086.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 131300405 is about 11458.6388807746. The cubic root of 131300405 is about 508.2632259014.

Adding to 131300405 its reverse (504003131), we get a palindrome (635303536).

The spelling of 131300405 in words is "one hundred thirty-one million, three hundred thousand, four hundred five".