131438071 has 2 divisors, whose sum is σ = 131438072. Its totient is φ = 131438070.

The previous prime is 131438009. The next prime is 131438093. The reversal of 131438071 is 170834131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131438071 - 2¹¹ = 131436023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131438971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65719035 + 65719036.

It is an arithmetic number, because the mean of its divisors is an integer number (65719036).

Almost surely, 2^131438071 is an apocalyptic number.

131438071 is a deficient number, since it is larger than the sum of its proper divisors (1).

131438071 is an equidigital number, since it uses as much as digits as its factorization.

131438071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 131438071 is about 11464.6443904728. The cubic root of 131438071 is about 508.4407986596.

The spelling of 131438071 in words is "one hundred thirty-one million, four hundred thirty-eight thousand, seventy-one".