131710609109 has 2 divisors, whose sum is σ = 131710609110. Its totient is φ = 131710609108.

The previous prime is 131710609097. The next prime is 131710609123. The reversal of 131710609109 is 901906017131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124080062500 + 7630546609 = 352250^2 + 87353^2 .

It is a cyclic number.

It is not a de Polignac number, because 131710609109 - 2³² = 127415641813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131710609139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65855304554 + 65855304555.

It is an arithmetic number, because the mean of its divisors is an integer number (65855304555).

Almost surely, 2^131710609109 is an apocalyptic number.

It is an amenable number.

131710609109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131710609109 is an equidigital number, since it uses as much as digits as its factorization.

131710609109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 38.

The spelling of 131710609109 in words is "one hundred thirty-one billion, seven hundred ten million, six hundred nine thousand, one hundred nine".