131081389 has 2 divisors, whose sum is σ = 131081390. Its totient is φ = 131081388.

The previous prime is 131081333. The next prime is 131081471. The reversal of 131081389 is 983180131.

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., 94575625 + 36505764 = 9725^2 + 6042^2 .

It is an emirp because it is prime and its reverse (983180131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131081389 - 2¹¹ = 131079341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131081689) 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, 65540694 + 65540695.

It is an arithmetic number, because the mean of its divisors is an integer number (65540695).

Almost surely, 2^131081389 is an apocalyptic number.

It is an amenable number.

131081389 is a deficient number, since it is larger than the sum of its proper divisors (1).

131081389 is an equidigital number, since it uses as much as digits as its factorization.

131081389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 131081389 is about 11449.0780851560. The cubic root of 131081389 is about 507.9804653348.

The spelling of 131081389 in words is "one hundred thirty-one million, eighty-one thousand, three hundred eighty-nine".