131992129 has 2 divisors, whose sum is σ = 131992130. Its totient is φ = 131992128.

The previous prime is 131992117. The next prime is 131992151. The reversal of 131992129 is 921299131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83759104 + 48233025 = 9152^2 + 6945^2 .

It is an emirp because it is prime and its reverse (921299131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131992129 - 2⁷ = 131992001 is a prime.

It is not a weakly prime, because it can be changed into another prime (131902129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65996064 + 65996065.

It is an arithmetic number, because the mean of its divisors is an integer number (65996065).

Almost surely, 2^131992129 is an apocalyptic number.

It is an amenable number.

131992129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131992129 is an equidigital number, since it uses as much as digits as its factorization.

131992129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 37.

The square root of 131992129 is about 11488.7827466621. The cubic root of 131992129 is about 509.1542164807.

The spelling of 131992129 in words is "one hundred thirty-one million, nine hundred ninety-two thousand, one hundred twenty-nine".