131023 has 2 divisors, whose sum is σ = 131024. Its totient is φ = 131022.

The previous prime is 131011. The next prime is 131041. The reversal of 131023 is 320131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131023 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65511 + 65512.

It is an arithmetic number, because the mean of its divisors is an integer number (65512).

2¹³¹⁰²³ is an apocalyptic number.

131023 is a deficient number, since it is larger than the sum of its proper divisors (1).

131023 is an equidigital number, since it uses as much as digits as its factorization.

131023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 131023 is about 361.9709933130. The cubic root of 131023 is about 50.7905029056.

Adding to 131023 its reverse (320131), we get a palindrome (451154).

The spelling of 131023 in words is "one hundred thirty-one thousand, twenty-three".