131538909643 has 2 divisors, whose sum is σ = 131538909644. Its totient is φ = 131538909642.

The previous prime is 131538909637. The next prime is 131538909707. The reversal of 131538909643 is 346909835131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131538909643 - 2¹³ = 131538901451 is a prime.

It is not a weakly prime, because it can be changed into another prime (131538909043) 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, 65769454821 + 65769454822.

It is an arithmetic number, because the mean of its divisors is an integer number (65769454822).

Almost surely, 2^131538909643 is an apocalyptic number.

131538909643 is a deficient number, since it is larger than the sum of its proper divisors (1).

131538909643 is an equidigital number, since it uses as much as digits as its factorization.

131538909643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 131538909643 in words is "one hundred thirty-one billion, five hundred thirty-eight million, nine hundred nine thousand, six hundred forty-three".