131422009 has 2 divisors, whose sum is σ = 131422010. Its totient is φ = 131422008.

The previous prime is 131422007. The next prime is 131422021. The reversal of 131422009 is 900224131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 57805609 = 8580^2 + 7603^2 .

It is an emirp because it is prime and its reverse (900224131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131422009 - 2¹ = 131422007 is a prime.

Together with 131422007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131422007) 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, 65711004 + 65711005.

It is an arithmetic number, because the mean of its divisors is an integer number (65711005).

Almost surely, 2^131422009 is an apocalyptic number.

It is an amenable number.

131422009 is a deficient number, since it is larger than the sum of its proper divisors (1).

131422009 is an equidigital number, since it uses as much as digits as its factorization.

131422009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 131422009 is about 11463.9438676225. The cubic root of 131422009 is about 508.4200869822.

It can be divided in two parts, 13142 and 2009, that added together give a palindrome (15151).

The spelling of 131422009 in words is "one hundred thirty-one million, four hundred twenty-two thousand, nine".