131411909 has 2 divisors, whose sum is σ = 131411910. Its totient is φ = 131411908.

The previous prime is 131411897. The next prime is 131411911. The reversal of 131411909 is 909114131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124389409 + 7022500 = 11153^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 131411909 - 2²⁴ = 114634693 is a prime.

Together with 131411911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131411509) 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, 65705954 + 65705955.

It is an arithmetic number, because the mean of its divisors is an integer number (65705955).

Almost surely, 2^131411909 is an apocalyptic number.

It is an amenable number.

131411909 is a deficient number, since it is larger than the sum of its proper divisors (1).

131411909 is an equidigital number, since it uses as much as digits as its factorization.

131411909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 131411909 is about 11463.5033475810. The cubic root of 131411909 is about 508.4070623387.

The spelling of 131411909 in words is "one hundred thirty-one million, four hundred eleven thousand, nine hundred nine".