131323013 has 2 divisors, whose sum is σ = 131323014. Its totient is φ = 131323012.

The previous prime is 131323009. The next prime is 131323051. The reversal of 131323013 is 310323131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131285764 + 37249 = 11458^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 131323013 - 2² = 131323009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131322982 and 131323000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131323613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65661506 + 65661507.

It is an arithmetic number, because the mean of its divisors is an integer number (65661507).

Almost surely, 2^131323013 is an apocalyptic number.

It is an amenable number.

131323013 is a deficient number, since it is larger than the sum of its proper divisors (1).

131323013 is an equidigital number, since it uses as much as digits as its factorization.

131323013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131323013 is about 11459.6253429159. The cubic root of 131323013 is about 508.2923960464.

Adding to 131323013 its reverse (310323131), we get a palindrome (441646144).

The spelling of 131323013 in words is "one hundred thirty-one million, three hundred twenty-three thousand, thirteen".