131642971 has 2 divisors, whose sum is σ = 131642972. Its totient is φ = 131642970.

The previous prime is 131642969. The next prime is 131643013. The reversal of 131642971 is 179246131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131642971 - 2¹ = 131642969 is a prime.

Together with 131642969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131642171) 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, 65821485 + 65821486.

It is an arithmetic number, because the mean of its divisors is an integer number (65821486).

Almost surely, 2^131642971 is an apocalyptic number.

131642971 is a deficient number, since it is larger than the sum of its proper divisors (1).

131642971 is an equidigital number, since it uses as much as digits as its factorization.

131642971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 131642971 is about 11473.5770795337. The cubic root of 131642971 is about 508.7048658111.

The spelling of 131642971 in words is "one hundred thirty-one million, six hundred forty-two thousand, nine hundred seventy-one".