131023603 has 2 divisors, whose sum is σ = 131023604. Its totient is φ = 131023602.

The previous prime is 131023553. The next prime is 131023619. The reversal of 131023603 is 306320131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131023603 - 2⁹ = 131023091 is a prime.

It is not a weakly prime, because it can be changed into another prime (131023643) 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 as a sum of consecutive naturals, namely, 65511801 + 65511802.

It is an arithmetic number, because the mean of its divisors is an integer number (65511802).

Almost surely, 2^131023603 is an apocalyptic number.

131023603 is a deficient number, since it is larger than the sum of its proper divisors (1).

131023603 is an equidigital number, since it uses as much as digits as its factorization.

131023603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 131023603 is about 11446.5541976614. The cubic root of 131023603 is about 507.9058082230.

Adding to 131023603 its reverse (306320131), we get a palindrome (437343734).

The spelling of 131023603 in words is "one hundred thirty-one million, twenty-three thousand, six hundred three".