131439785539 has 2 divisors, whose sum is σ = 131439785540. Its totient is φ = 131439785538.

The previous prime is 131439785473. The next prime is 131439785549. The reversal of 131439785539 is 935587934131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131439785539 - 2¹¹ = 131439783491 is a prime.

It is not a weakly prime, because it can be changed into another prime (131439785549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65719892769 + 65719892770.

It is an arithmetic number, because the mean of its divisors is an integer number (65719892770).

Almost surely, 2^131439785539 is an apocalyptic number.

131439785539 is a deficient number, since it is larger than the sum of its proper divisors (1).

131439785539 is an equidigital number, since it uses as much as digits as its factorization.

131439785539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 58.

The spelling of 131439785539 in words is "one hundred thirty-one billion, four hundred thirty-nine million, seven hundred eighty-five thousand, five hundred thirty-nine".