131688149 has 2 divisors, whose sum is σ = 131688150. Its totient is φ = 131688148.

The previous prime is 131688127. The next prime is 131688163. The reversal of 131688149 is 941886131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128097124 + 3591025 = 11318^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 131688149 - 2²⁴ = 114910933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131648149) 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, 65844074 + 65844075.

It is an arithmetic number, because the mean of its divisors is an integer number (65844075).

Almost surely, 2^131688149 is an apocalyptic number.

It is an amenable number.

131688149 is a deficient number, since it is larger than the sum of its proper divisors (1).

131688149 is an equidigital number, since it uses as much as digits as its factorization.

131688149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 131688149 is about 11475.5456950857. The cubic root of 131688149 is about 508.7630525863.

The spelling of 131688149 in words is "one hundred thirty-one million, six hundred eighty-eight thousand, one hundred forty-nine".