131344403 has 4 divisors (see below), whose sum is σ = 134398968. Its totient is φ = 128289840.

The previous prime is 131344379. The next prime is 131344417. The reversal of 131344403 is 304443131.

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 131344403 - 2¹⁰ = 131343379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131344453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527218 + ... + 1527303.

It is an arithmetic number, because the mean of its divisors is an integer number (33599742).

Almost surely, 2^131344403 is an apocalyptic number.

131344403 is a deficient number, since it is larger than the sum of its proper divisors (3054565).

131344403 is an equidigital number, since it uses as much as digits as its factorization.

131344403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054564.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 131344403 is about 11460.5585815003. The cubic root of 131344403 is about 508.3199915755.

Adding to 131344403 its reverse (304443131), we get a palindrome (435787534).

The spelling of 131344403 in words is "one hundred thirty-one million, three hundred forty-four thousand, four hundred three".