131269129 has 2 divisors, whose sum is σ = 131269130. Its totient is φ = 131269128.

The previous prime is 131269031. The next prime is 131269141. The reversal of 131269129 is 921962131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118309129 + 12960000 = 10877^2 + 3600^2 .

It is an emirp because it is prime and its reverse (921962131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131269129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131269094 and 131269103.

It is not a weakly prime, because it can be changed into another prime (131269169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65634564 + 65634565.

It is an arithmetic number, because the mean of its divisors is an integer number (65634565).

Almost surely, 2^131269129 is an apocalyptic number.

It is an amenable number.

131269129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131269129 is an equidigital number, since it uses as much as digits as its factorization.

131269129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 131269129 is about 11457.2740649772. The cubic root of 131269129 is about 508.2228662823. Note that the first 3 decimals are identical.

The spelling of 131269129 in words is "one hundred thirty-one million, two hundred sixty-nine thousand, one hundred twenty-nine".