131803717 has 2 divisors, whose sum is σ = 131803718. Its totient is φ = 131803716.

The previous prime is 131803709. The next prime is 131803783. The reversal of 131803717 is 717308131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75238276 + 56565441 = 8674^2 + 7521^2 .

It is a cyclic number.

It is not a de Polignac number, because 131803717 - 2³ = 131803709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131803117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65901858 + 65901859.

It is an arithmetic number, because the mean of its divisors is an integer number (65901859).

Almost surely, 2^131803717 is an apocalyptic number.

It is an amenable number.

131803717 is a deficient number, since it is larger than the sum of its proper divisors (1).

131803717 is an equidigital number, since it uses as much as digits as its factorization.

131803717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 131803717 is about 11480.5799940595. The cubic root of 131803717 is about 508.9118372656.

The spelling of 131803717 in words is "one hundred thirty-one million, eight hundred three thousand, seven hundred seventeen".