131206129 has 2 divisors, whose sum is σ = 131206130. Its totient is φ = 131206128.

The previous prime is 131206081. The next prime is 131206139. The reversal of 131206129 is 921602131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103063104 + 28143025 = 10152^2 + 5305^2 .

It is a cyclic number.

It is not a de Polignac number, because 131206129 - 2¹⁹ = 130681841 is a prime.

It is not a weakly prime, because it can be changed into another prime (131206139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65603064 + 65603065.

It is an arithmetic number, because the mean of its divisors is an integer number (65603065).

Almost surely, 2^131206129 is an apocalyptic number.

It is an amenable number.

131206129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131206129 is an equidigital number, since it uses as much as digits as its factorization.

131206129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 131206129 is about 11454.5243899518. The cubic root of 131206129 is about 508.1415494631.

The spelling of 131206129 in words is "one hundred thirty-one million, two hundred six thousand, one hundred twenty-nine".