131263886639 has 2 divisors, whose sum is σ = 131263886640. Its totient is φ = 131263886638.

The previous prime is 131263886617. The next prime is 131263886693. The reversal of 131263886639 is 936688362131.

Together with next prime (131263886693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (936688362131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131263886639 - 2²⁴ = 131247109423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131263886539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65631943319 + 65631943320.

It is an arithmetic number, because the mean of its divisors is an integer number (65631943320).

Almost surely, 2^131263886639 is an apocalyptic number.

131263886639 is a deficient number, since it is larger than the sum of its proper divisors (1).

131263886639 is an equidigital number, since it uses as much as digits as its factorization.

131263886639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The spelling of 131263886639 in words is "one hundred thirty-one billion, two hundred sixty-three million, eight hundred eighty-six thousand, six hundred thirty-nine".